2 Hours of Nonstop Amazing Science Experiments for Home, School Exhibition & Science Fair Projects

hello and welcome to hoop our kids lab making science super fun and super simple today we're going to be showing you some really cool experiments and all revolving around coca-cola you're going to need a pair of scissors a Stanley knife some water cubes of jelly a bowl gas a peak a funnel a bottle of coke and a measuring joke firstly empty the coke bottle into the bowl it might fit up a bit so be careful once you've finished take the bottle and remove the label keep it for later and slice down the middle of the bottle with your knife like so once that's done seal it shut with some gaffer tape now add your jelly cubes to your measuring jug add some water and heat in the microwave until the cubes are fully dissolved pour your jelly mixture into your coke stir it together until the bubbles settle now use your funnel to pull the whole mixture into your coke bottle there might be a few small leaks on the side of your bottle where you cut a hole if you find these just take the time to use some more tape to seal them up you also need to pour quite slowly and steadily as it will start to fizz over fill your bottle all the way to the top screw the lid back on and we're done now it's time to place our bottle in the fridge and leave it for one week now peel off the tape and open up your coke bottle if we very carefully crack open the bottle we have a perfectly molded bottle of coke isn't that cool it will feel really strange a really strong kind of jelly now to complete the trick replace the cap from your bottle then take the label that you kept to one side and put it back in place where it would be on a normal bottle and there you go coke jelly you can take a knife and slice right into it what a great trick it looks like a regular bottle of coke but it's made only of jelly now it's time for Coke versus Coke Zero you'll need one bottle of each of the drinks first we boiled some coke on a hob this takes about an hour and then the coke should fully have evaporated once all your coke has evaporated it will leave behind a thick sugary sludge as you can see it's extremely thick like treacle this is all the sugar that's left over from your coke once you've evaporated the water from the drink as you can see there's quite a lot now let's boil up some of the Coke Zero this version of coke is supposed to have zero sugar so let's see what happens when we remove all the water place it on the heat and let the liquids boil away and look at that it seems that Coke Zero really doesn't have any sugar in it there's a tiny amount left in the pan but that could be any other chemicals involved in the making of the drink when you compare that to the huge amount of sugar each lunch left over from boiling regular coke the difference is really obvious now for our next experiment only the funnel some vinegar a plastic bottle a half-empty bottle of flat coke baking powder a Stanley knife some flexible PVC hose and a glue gun remove the bottle cap from your empty bottle and cut a hole in the middle of it make sure it's big enough for the hose to fit through I'm going to do this using the stanley knife make sure that you have an adult helping you with this part of the experiment as these knives are very sharp with some time in a bit of patience you should be able to make a hole just big enough for the hose to fit through now repeat this process by cutting a hole in the cap from your coke bottle put the other end of your hose through this cap you should now have a length of hose with two bottle caps on it now let's replace our bottle caps nice and tightly that's one and two now we just need to adjust our hose so that one end goes all the way down into the cope that's left in the bottle plug in your glue gun and use it to seal up any gaps between the bottle cap and the hose make sure you do this on both of your bottle caps now remove the cap from the empty bottle pour in some of your vinegar and now add some baking powder using your funnel there should be a reaction that's very quick so be prepared you should see lots of fizzing so very quickly replace your cap you'll see bubbles coming out through the coke the gases that are being created in your first bottle are being sent through the hose into your coke bottle and they're actually recarbanation your flat coke which means they're putting tiny gas bubbles back into the liquid when the process is finished you should end up with some amazing sparkling coke let's pour it into a glass and see yep looks like there's plenty of bubbles to me this is a really great experiment and really great so that none of your cloak ever goes to waste that's how you can recarbanation for the first experiment let's use some coke cans place on top of each other like this and then another in the middle take a thin piece of wood like this and place one of your magnets on top then stick a magnetic coin onto the underside of your wood and then another coin onto that and another and another see how many you can put in one row can you rotate the coins like this why don't you try slowly dragging the magnet along the surface like so see what happens try and pull the magnet away from the wood and see if the coins will stay in place now let's try another one with a thinner piece of wood balanced for coins on top of each other like this place them directly under the magnet and see how strong the magnetic field is it looks like the coins are levitating it's a great simple piece of science isn't that cool if you don't see the magnet it's a really cool optical illusion you can try and rotate the coin like this be careful or they might get stuck now let's see what happens if we add a few paper clips loop them together into a chain like so then bend the one on the end into an L shape and carefully hold the last paper clip towards the magnet it will hold the chain in midair even the slightest knot can make it fall down you can also try holding the chain above the magnet like this and see what happens when the end of the chain gets too close to the magnet today we're going to show you a range of experiments or using sound you're going to need a rubber band some pens and a cereal box place your cereal box on the table like this then stretch your rubber band along the length of it like so make sure it fits tightly then take your pens place the first one under the rubber band at the end like this then place the second underneath it and move it along by plucking the elastic band you'll be able to create a different range of sounds as you move the pen it's just like playing a guitar and moving your fingers down the strings isn't that cool that's my favorite song now you'll need the length of plastic tube and the pencil wrap the tube around the back of your head and place each end of it near one of your ears have someone taps the tube along its length and see if you can guess which side they've tapped it on you should be able to tell quite easily because the tube will echo the sound of the pencil along its length now grab some pieces of spaghetti and some marshmallows slop the spaghetti into the marshmallows like this and gently bounce like so you see that very long pieces of spaghetti bounce very easily shorter ones don't bounce as much it doesn't take a lot of pressure or a lot of wiggling to make them snap the longer pieces of spaghetti can last a long time without snapping and Bend further you're going to need lots of pieces of cardboard like this you'll need some different size coins a pencil a pen a ruler a pair of scissors a craft knife and a glue gun take some of your card and cut it in half like so then get your coins ready draw a line along with your ruler like this you'll need to make several marks at regular intervals make sure each interval is bigger than your coin and then there's a gap in between each interval that's the same size it should look something like this now it's time to get that craft knife out again trim along the edges to make it nice and neat then cut out the spaces like this that you marked around your coins they should all be slightly different sizes time for your glue gun take a smaller piece of card and place glue along one edge then stick it in place on the edge of your first piece like this you repeat the process and fix this piece of card down on the line nearest the holes for the coins now let's carry on you'll need two l-shaped pieces of card and two other pieces of card that can fit along the two edges put some hot glue along the edge of one of your L shapes and stick it down use some more glue to stick the other L shape onto the opposite side when that's secure use some more glue to finally put the last bigger piece of card into place this will create the backing for your machine now take a smaller piece of card again a mark along at three regular intervals you'll need to make these triangular pieces of card as well it's a fairly simple wedge shape stick them into place along your three lines and then slot them into your machine like this this is the mechanism that will help to separate your coins fasten another piece of card down the front with some glue this will stop your coins escaping then get your first piece and stick it into place at an angle like this so that the end of it reaches into your last compartment get that glue gun out again and fasten another piece of card in place now let's make our top piece we'll label it like this get lots of glue going around the edge to make sure that nothing comes off and fasten it into place on the front we'll mark out our coins I've got 50 PS 10 PS 20 peas and 5 P now all that's left is to slot the coins into the machine because of the order of the holes in your coin sorting machine for smallest coin falls through the smallest hole and the largest coin won't fall through any of the holes I will instead roll all the way down to the end to the final compartment it's important to order the coins from largest to smallest so that they were you're going to need a couple of coins a jug of water a dropper and some olive oil using the dropper carefully place a few drops of water on top of the coins look very closely at the water and the shape that it takes it starts to create a dome on top of the coin this is because there's a very slight edge around a 1 pence coin which helps to contain the water on top this is a really simple little trick if you look very closely you can see that it picks up very small vibrations if you push it too far the water will spill over the edge why don't you try touching the surface of the water being careful not to disturb it too much now let's try the same again with oil to see what happens using oil instead of water has much the same effect but because the oil is very slightly thicker than the water it stays together more easily there's more tension holding it together for this next one take a mirrored surface and a water dropper place some small drops of water on the mirrored surface don't put them too close together or they'll run together if we refocus the camera you can see that each water droplet acts like a magnifying glass it also inverts the picture to turn it upside down let's look at this from above isn't that cool now one last experiment take a metal pot and put it on the stove pour a small amount of water inside until it bubbles and evaporates when it's all gone you're ready to go on take a few drops of water inside your pan you should see small bubbles of water rolling around inside the pan what a great trick not what you'd expect from the water at all today we're going to show you how you can make your very own kaleidoscope you're going to need some colored beads some tape a mirrored surface some black card some tracing paper a pair of scissors cling film and a cardboard tube firstly we need to cut down our mirrored surface to fit it inside our cardboard tube cut three strips that are the same size put them face down on the tabletop and then use the tape to stick them together make sure there's a slight gap in between each piece this will mean that you can then fold them over like this carefully fold them into a triangle shape and stick them into place you should be able to slip it inside your cardboard tube just like this once you're sure it fits use a sharp knife to cut a small section off the end of your tube about one or two inches in length then take some of your cling film stretch it over the top of your long piece of cardboard tube and then use some tape to hold it in place then replace the small section of card and use more tape to fasten it open up your bag of colored beads and tips on inside they should sit comfortably on top of your cling film like this then stretch some more cling film over the top and use more tape to hold it in place make sure that it's stretched nice and tight if you look through the tube you can see the beads now fit your tracing paper cut out a circle the same size as your cardboard tube then slot it inside the tube and use your scissors or another long object to place it right down the very end then insert your mirror triangle place your tube on top of some black card and trace around it with a sharp knife or a pair of scissors cut out the circle then fold it in half and use a pair of scissors to cut a small circle in the center like this this will make the view piece for your kaleidoscope stick the circle on the other end of your cardboard tube like this using some tape awesome glue to hold it in place and now you've got your kaleidoscope if you like you can stick some card on the outside to neaten it like this then simply point it towards the light put it to your eye and you have a fully functional kaleidoscope fantastic you can make some amazing shapes and amazing colors awesome today we've got an awesome range of experiments for you including how to make your very own study hand game for this first experiment you'll need an ice cube some water and a glass fill up your glass with water make sure the water line goes right to the top of the glass now put the ice cube inside what do you think will happen as you can see the water line only rises very slightly for this next experiment you're going to need an LED light some wire cutters a 9-volt battery some electrical tape and some wiring firstly separate your two strands of wiring one red one black cutoff one short section of black wire like this then trim off the plastic coating and expose the wires inside you can get a special tool that helps you to do this but if you're very careful you should be able to do it with the wire cutters then expose the inner wire on the remaining piece of black cable trim one end of plastic coating off the red cable then move down about six to eight inches cut into the plastic and very carefully separate it from the cable inside if your wiring is anything like mine you'll find that it's actually made of lots of very thin strands so try to keep them together as much as possible you can do this by twisting the wire together let's go back to the longer piece of black wire fold one end of cable round to make a hoop shape like this then twist the plastic coated end of your red wire together like so to make another hoop shape press down into the wire very hard to bend it into a shape like this wrap your small piece of black cable around one end and on the other end wrap your longer piece of cable next you need to make contact with your battery take the exposed end of your short flat cable onto the 9-volt battery like this making sure that it only touches one of the contacts then get your red hoop cable and fit it on like so use some tape to hold it in place what we have here is almost a complete circuit when our hoop makes contact with the exposed cable the LED light should light up however in this case it doesn't I think I know why that might be what actually happened here was the LED light lit up for a few seconds and then went out straight away so the battery was too strong using this watch battery the experiment should work much better you'll see that every time the hoop makes contact with the cable the LED light should light up like so and that's why this is called a steady hand gain for this experiment you'll need salt you'll need a balloon some food dye fill up your balloon with water and leave in the freezer overnight you'll end up with a big frozen balloon like this one awesome carefully peel off the rubber of your balloon brilliant you should end up with a nice big sphere of ice like this one next cover the ice in salt and now add a few drops of food coloring and watch what happens let's add some thinner food coloring as the salt melts the ice it changes the surface from a very smooth spherical shape to a grainy less organised shape it creates channels in the ice which the food coloring helps to highlight looking down from above it's like some sort of alien world it looks really cool if we look down towards the bottom you can see the very thin channels of food coloring that the salt has helped to create why not try it with different colors of food coloring to see if there's any difference today we've got a range of experiments to show you including how to split water you're going to need two pins two syringes a battery food coloring some salt a plastic cup a sharp knife and some water take your plastic cup and put it upside down on the table very carefully push your two pins through like this make sure that they're the correct distance apart so that your battery can meet them like so pour your salt into the cup one or two teaspoons should be enough and then pour in some water now let's add some food dye so that we can really see what's going on in this experiment now take your craft knife and very carefully cut off the ends of your syringes like this you should end up with two tubes each with a plunger attached like so place the tubes into the water and pull the syringe backwards so that it fills with liquid stand them upright and try using a piece of tape to hold them in place like so then simply sit your cup on top of the battery very quickly you'll see bubbles start to form and the color-changing inside one of your syringes what's happening here is a chemical reaction where the water which is known scientifically as h2o is split into its two components hydrogen and oxygen the positive and the negative charges of the battery are separating the hydrogen and oxygen based on their charges you'll see that the solution has also changed color now let's go outside you'll need a long plastic tube and a bucket head to your tap and fill the bucket with water let's add a bit of food dye just to make things a bit clearer we're going to make a gravity pump you need to repeatedly pull the tube in and out of the water like this and use your thumb to cover the end intermittently once you get the technique right you'll be able to raise the water level inside the tube like so I managed to get it about three feet off the ground but I'm sure you can do better this is a really cool gravity defying trick and one that's very hard to get the hang off now you're going to need a cocktail stick and googly eyes a couple of wooden skewers a cork and a glue gun take your cork in your skewers and your toothpick place the skewers into your cork like so make sure that there is symmetrical as you can make them then push the cocktail stick into the center at the bottom of the cork use some putty or some blue tack on the bottom of the skewers to weigh them down you should be able to sit the cork on top of your fingertip like this well not quite like that clearly I haven't got the balance right yet try adding or removing some putty on each of the skewers until it balances just right you should be able to spin it round like so without it falling down even I need a bit of practice to add some more fun to the experiments you can stick your googly eyes onto the cork and there you have a talented new friend this one's called Corky this is a really neat little toy you can make yourself it's almost impossible to make it fall over try spinning him round and see what happens when he wobbles awesome today we're going to show you an awesome experiment about how to write your own secret message with some secret glances you're going to need some transparent red plastic a piece of paper a pair of glasses a crayon a highlighter and a red ballpoint pen you also need a pair of scissors take your glasses and your red plastic use your marker pen to draw around the lenses of your glasses I found these glasses in a costume shop then carefully cut around the lens shapes my suggestion would be to cut them out slightly too large at the start because you can always trim them down later on pop them inside your glasses to see if they fit if they do great next use your crayon to lightly write a secret message in this case I think we'll write I love lab then use your ballpoint pen to scribble over your secret message in a few different directions the aim is to try and hide the message if you can then do one more layer with your highlighter now if I put on my glasses suddenly the message is revealed that's the Khans the red in the plastic helps to filter out the red ink in the pen which makes the crayon suddenly visible this is a great way of writing secret messages to your friends brilliant now you're going to need some black card a pair of scissors a marker pen a glue gun a pair of glasses and some mirror material first take your glasses and your mirror material put some glue onto the bridge of your glasses like so put the mirror material into place and add a bit more glue until it holds you wantin to sit roughly as a 45-degree angle to the lenses repeat this process with your second piece of mirror material use your scissors to trim off some of the corners from your mirror material after all you do need to wear the glasses that should work now we'll need our black card sit the mirror material flat on the card and place some glue along the bottom edge now we need to trim around like so cut a few lines parallel to your mirror material once again trim in near the bridge of your glasses so that your nose can fit through then trim out the triangle from the middle you'll end up with two pieces of black material like so then take some more card and trace out the shape like this one cut out your shape make sure that it fits on top of your glasses turn your glasses upside down and then use some more glue to fix it into place it's always important with hot glue to make sure that you keep your fingers well away and give it time to dry get some more glue right into the very edges of the card to make sure that it stays in place it will also help to block out light then simply go around this cut out with scissors to neaten it up I think you'll agree it's already looking very stylish now we just need to add the N piece to our glasses take a couple of squares of your black card and using your glue gun stick them into place make sure to keep pressure on the glue to hold the card in place while the glue dries we're going to add another couple of small pieces of card just inside here this will help plug up any holes now just for fun we're going to stick some googly eyes onto the end of our glasses and finally one last piece of card on the center to block out any last bits of light now we can hit the streets these glasses are designed to help you see what's coming to help you see round corners and they can work as excellent spy glasses with these glasses on no one will be able to sneak up on you ever again better luck next time today we've got two really cool experiments to show you which both involve mechanisms you're going to need a zipper type a drinking straw a pair of scissors and some tape place the zip tie inside the straw like so just to make sure it fits then take your scissors and make a bend about the third of the way along the length of your straw carefully cut a small notch out of your straw like so then make another notch on the other third of the tube like so carefully slop your zip tied through the straw don't let it poke out through the notches then the end over and use some of the tape to hold it in place try pushing and pulling the Zips eyes to see what happens you'll see the de straw bends in the places where you've made notches it works in much the same way that the human finger works this is a really simple mechanism used to demonstrate some really simple biology now for another experiment you're going to need some pins you're going to need a stick of glue from a glue gun some wooden sticks and some scissors firstly take your scissors and cut some small sections out of the stick of glue place one of the lolly sticks on top and push a pin carefully through so that the sharp section goes into the glue you should end up with an X shape like this then repeat this with the end of the cocktail stick like so and mirror the pattern with a fourth stick you want to make a series of these which should look like a series of connective X's make sure that you use the pieces of glue to obstruct the sharp point to the pin you wouldn't want to hurt yourself keep doing this until you've ended up with about a dozen or so six all join together then all you need to do is pinch the first two sticks together and there you go this is a really cool telescopic grabbing mechanism what do you see how long you can make yours today we're going to show you an awesome experiment that involves making your own hourglass you'll need a couple of straws some strong glue a pair of scissors some tapes two identical bottles some vegetable oil and a jug of water take the bottles and remove the caps use your glue to stick the two caps together like so give the glue some time to dry and then use your scissors like this to make two holes they need to be round and large enough for your straws to fit through again take your scissors and cut to short lengths pop each of the straws slot them through the holes in the bottle caps like so and push them through so that they look like this they're essentially mirror images of each other next take the two bottles pour water into the first bottle until it's almost full then pour vegetable oil into the second bottle until it's equally full it's important to get the levels identical then replace the cap and screw it on tightly you can always use some glue if you want to make sure it stays in place then quickly flip it upside down and screw the other bottle cap in place then turn your hourglass upside down so that the water's on top and watch what happens the water will start to drop through the straws like so this is because water is heavier than oil as the water goes down the oil will come up through the straw to replace the water that's lost this is a really great experiment for you to do at home and one that can come in handy for future experiments if you need to time something if you get the bottle size just right and the amount of liquids you might be able to create an hourglass that lasts you exactly one hour if you've got the patience you can sit and watch it to find out just how long it lasts firstly you'll need a few binder clips in all different sizes take a smartphone make sure that it's not in a bulky case you'll need your USB charging cable a small clip and a large clip place the phone end of your charger cable in the small clip with the charging point facing upwards remove the metal clips from your binder and then clamp it in place using the larger clip remove the metal clamps from that and then place it flat on the table plug in the USB end and then plug in your phone there you have it you've got a charging dock number 2 clamp the metal carts of a small binder clip inside a large binder clip then tilt up the plastic end and there you go you've got a landscape phone holder it'll also work in portrait but what if you're watching a movie simply clamp a piece of paper in between two of your clips and spread it out until it's wide enough for the phone to sit inside the metal parts of the clip now if you're like me you've got lots of cables at your desk getting in the way but don't worry because the binder clip is here to help you you can use it as a really handy cable tidy use small clips for thin cables and larger clips the thicker cables my headphones are always getting tangled up but fortunately the binder clip is here to help us you can feed your headphones through one end and then wrap the wire all the way around the metal clips done nice and tidy there are your binder clip like that today we're going to show you how you can make your own do-it-yourself projector you're going to need a cardboard box a magnifying glass some gaffer tape a scalpel a pair of scissors and a pencil the first step is to use the scalpel to remove one of the flaps from the box when that's done take your magnifying glass and hold it against one side of the box use the pencil to carefully draw around the magnifying glass use the scalpel to carefully cut out the circle shape it's best to ask an adult to help you with this part of the experiment make sure to be careful when using the scalpel once you've cut out the circle fit the magnifying glass into place you might be able to remove the handle from yours we couldn't but that shouldn't affect things too much use some of the Gaffa tape to secure the magnifying glass in place this creates the lens for your projector then take the piece of cardboard that you cut off earlier and fold it up to make a stand for your phone check that your phone fit securely onto the stand once you've done that load up a video onto your phone you'll need to change your phone settings so that the screen doesn't rotate and then place the phone so that the video plays upside down when the image transfers through the magnifying glass it will be turned around the right way take the box into a dark room and there you go the image is projected onto the wall and you've got your own cinema at home you'll need to try moving the phone around into slightly different positions and angles in order to get the clearest picture and it's never going to be as clear as it is at the cinema but it's still a really cool trick that you can do very easily at home and there you go that's how you can make your very own do-it-yourself projector this is a fun little experiment you just need a spoon some scissors a glass of water a pipette some granulated sugar and dish soap take your glass of water and mix in a tablespoon of sugar then add 2 tablespoons of dish soap mix this in thoroughly so that you can no longer see the sugar granules this might take a bit of time but just be patient place the mixture to one side if your fingers in the glass and rub a small amount of it over your surface this will help you to make the bubbles then take your clip pet and very carefully use the scissors to cut off the end this will help you blow your bubbles get the end in and very carefully blow a bubble on the table once that's done dip it in the mixture again carefully push the pipette through the bubble and blow another one on the inside and you've got a bubble inside a bubble the washing-up liquid helps you make bubbles out of the water but the sugar helps those bubbles to be really strong the aim of the game is to see how many bubbles you can make inside another it actually gets quite tricky because the surface is very slippery and so the bubbles move around whenever you blow as you blow a smaller bubble inside the original bubble it simply pushes the air out words making the original bubble grow it's a really cool effect it's quite tricky to get the hang of but once you do there's no reason why you couldn't make four or five bubbles one inside the other and there you have it that's how you can make bubbles inside a bubble first of all we're going to dissolve some cups you'll need a foil tray a few foam cups and a bottle of acetone pour the acetone into the bottom of the tray and simply place the cups inside very quickly you'll see the reaction starts to take place the acetone seems to eat the cups this is a great experiment it almost looks like the cups of rotting rapidly and now I've got a great trick with a balloon you'll need a jug a balloon a plastic container some sunflower oil some cornstarch and a spoon for a good amount of cornstarch into the jug I've used about three tablespoons then pour some oil inside stir the mixture together until you get a very thick mixture a bit like custard blow up your balloon and tie it off at the end take your container and start to slowly pour some of the mixture into it while you're doing this rub your balloon on your jumper and hold it near the mixture you'll see that the mixture gets attracted to the balloon and slows down isn't that great today we're going to show you how you can make a kazoo from a straw mm-hmm like that you're going to need some drinking straws and a pair of scissors tap out the drinking straws onto a table so that they're all leveled then cut off any bent sections you need one long straight straw then press one end of the straw down so that it's as flat as you can make it and cut it into a pointed shape like this it should look a bit like the beak of a bird now let's see if it works while you play it if you cut the straw shorter you should notice that the sound changes depending on the length of the straw now let's see what an audience thinks it certainly seems like they're enjoying themselves for our next experiment you'll need some flower seeds a jug of water ziploc bag and some paper towel roll allows the length of the paper towel fold it up and soak it in the water squeeze out any excess and place it on the side repeat this a few times until you have a good amount of paper towel next take your packet of flower seeds open it up and sprinkle the seeds onto the paper towel try to make sure that the seeds are evenly spaced so that they've all got some room then roll up the paper towel place it inside your ziplock bag roll up the bag and then seal it up like so now put it to one side for a few days come back to the bag open it up and unroll the kit come back to your bag open it up and roll out your paper towel look closely at the seeds how many of them open like this a few of mine have started to sprout let's roll it back up and replace it inside the ziplock bag for a few more days to see what happens after a few more days most of the seeds have opened up and started to sprout into flower plants isn't that cool it just goes to show you don't have to plant seeds in soil to make them grow you can use any sort of absorbent material like kitchen towel to make it work next you'll need a tray and eggs a glass of water and a cardboard tube place your jug of water inside a container place the tray on the top then place your cardboard tube in the center on top of that and carefully balance your egg on the very top make sure it's above the center of the glass what we're going to want to do is try to knock out the tray and the tube and let the egg fall directly into the glass of water tada victory if we show you in slow motion you can see it drop straight down today we're showing you floating balloons without helium you're going to need a spoon some balloons a glass bottle some tinfoil sodium hydroxide and the beaker of water firstly take your water and your sodium hydroxide and mix a few spoonfuls with the water you can stir this in or mix it in until it's completely dissolved once it's dissolved you can pour the mixture into your glass bottle it's important to do this part outside as the mixture will start to give off some fumes once this is done you can insert some tin foil inside the glass bottle I roll mine up to look like sausages after a few seconds you'll see a reaction beginning this is the sodium hydroxide mixture reacting with the tin foil you'll notice something that looks like steam start to come out of the bottle then put a balloon over the neck of the bottle and hold it still you'll see that the balloon starts to inflate this is happening because of the gas being released by the reaction inside the bottle you'll need to be a bit careful as the reaction will also cause heat and so after a while the bottle will get quite hot once you think the balloon is inflated enough you can tie up the neck and let it go amazing right the reaction between a sodium hydroxide and water mixture and the metal of the tin foil creates hydrogen hydrogen is a gas that allows things to float it might be best if you've got some strength to tie up your balloons that you don't lose it mine got stuck in a tree today we're going to show you how you can make flowers glow in the dark you're going to need a tall bottle a measuring jug full of water some white flowers and a highlighter pen the first step is to take your highlighter pen and remove the end so that you can take the call of the pen out you might need an adult to help you with this once you've taken the cap off the pen you can use a pair of scissors or a very thin pair of pliers to remove the inside of the pen this is the part of the pen that holds all of the highlighting once you've got the core of the pen out bend the core a few times this will help the ink flow more freely leave the cord the pen to sit in the water for a few minutes this will make sure that most of the ink goes into the water once that's done you see all of the water has changed color to match the highlighter this is because the ink has flown in with the water take the core out of the jug and get your tall bottle then very carefully pour the colored water into the jug you'll want the bottle to be roughly half full once you've done that take your white flowers and carefully put them through the neck of your bottle make sure that the stems of the flowers are sitting in the liquid leave those overnight then when you come back to your bottle you'll see that the flowers look exactly the same well actually they don't if you turn on an ultraviolet or black light you'll see that the flowers suddenly glow in the dark why is this well it's because the flowers have drunk up the water from the bottle and when they've done that there's also soaked up the ink that's in the water this has gone up the stems of the flowers into the petals changing their color and making them fluoresce or glow in the dark under an ultraviolet light isn't that great you can see the ink has gathered more around the edges of the petals than the middle today we're going to show you our singing glasses this is a really cool experiment and all you're going to need is two wine glasses a cocktail stick and some water take your two glasses and put them very close together but not quite touching then pour some water into one of the glasses until it's about half full then carefully pour water into the second glass until it matches the level of the first if you go too far you'll need to pour some water into the first glass so that it matches make sure you're completely confident that the water level is exactly the same if you prefer you can measure the water beforehand then take your cocktail stick and place it carefully on top of one of the glasses then wet your finger and rub it along the edge of the first glass can you hear the glass singing well that's because that as you rub your finger along the edge of the glass it causes vibrations which in turn create sound and as you can see the vibrations seem to be working in the second glass as well even though they're not touching well this is because the water level is the same in both glasses and so their vibrational frequency is the same when another object picks up the same vibrations as the first we call this a sympathetic vibration these tiny vibrations that only create sound but movement as well and that's why the cocktail sticks seems to move all by itself and there we have it that is the amazing singing glasses experiment this is a really fun one you're going to need mug number one not number two and a soda can you're going to need the empty the soda can once you've done that place the can inside one of the cups and blow into the cup you'll see that the can jumps out you'll also see that this works regardless of which way round you put the can into the cup place the second cut close to the first and blow try to aim the can into the second cup why does this happen well the can is very light when you blow air into the space between the cup and the can it creates an area of high pressure this high-pressure air forms underneath the can and pushes it the air above the can is still at a low pressure and so the can is able to move based on the air alone why not move the cups around and see what you can do challenge your friends to see who can score the most points today we're going to show you how to make your very own static flier for this you're going to need a balloon a pair of scissors the plastic bag make sure you have an adult to help you with this experiment take your plastic bag and your pair of scissors and very carefully cut a thin strip out from the top edge of your plastic bag between one and two centimeters in width carefully open it up so that you have a ring of plastic the next step is to take your balloon breathe in deeply and blow it up once you've blown it up have an adult help you to tie the end off then rub your balloon on someone's hair until you see their hair start to stand on end then take your piece of plastic and rub it on the same person's hair release the plastic above your balloon and watch it fly why does this work well it's actually very simple by rubbing the balloon onto your friends hair you pick up a static electric charge by rubbing the plastic on the same person's hair you're giving it the same charge which means these two objects repel each other by placing the balloon under the plastic you push the plastic upwards and because it's so light it floats you can try this with different shapes of plastic like this jellyfish shape to see what works the best to see what kind of crazy shapes you can come up with you can try it with smaller balloons or bigger balloons to see which works the best I had a go with this smiley face and it worked quite well and there you have it that is how you create your very own static flier this is a really fun experiment all you're going to need is some blue tack two bottle tops three short straws two water bottles full of water a long straw a tub and a jug of water the first step is to make some holes in the bottle caps make sure that you have an adult to help you do this then carefully place your straws into both of the holes there should be a fairly tight fit make sure that one straw comes out mostly on the inside of the lid and the other straw comes out mostly on the outside of the lid then take your other lid make two holes again and place the long straw through the lid make sure that most of the length of the long straw is on the outside of the lid then take your last remaining short straw and place it inside you can easily see the difference between these two the next step is to take some blu-tack work it into a small shape and then carefully use it to block any gaps on the inside of the bottle lid this will help you have greater control over your experiment take your tub and place your two bottles of water inside if there are any gaps in the top use your jug of water to fill up the bottles until they overflow then tightly screw both of your lids onto each bottle make sure that there is an airtight seal all that's left now is to turn the bottles upside down and let the water flow what do you think is going to happen will the water leave each bottle at the same speed or the short one go faster or will the long one go faster well as you can see the water in the long straw bottle leaves much faster but why does this happen it's really very simple at the bottom of the straw there is very low pressure inside the bottle there is high pressure because one of the straws is much longer the difference in pressure is much greater and so water is forced out of the bottle quicker and there you have it that's how you can perform your very own water race where is gravity for this experiment you're going to need some magnets sellotape string a box and the nail the first step is to take your strength and your nail and tie a very tight knot around the nail using your string this might be a bit fiddly so stay with it once that's done make sure the knot is extremely tight then place your nail to one side take your magnet and your sellotape this experiment works best if all the magnets are arranged in one column once you've done that take a length of sellotape place your column of magnets into the center and stick the sellotape firmly to both sides there we go once you've done that take your box and carefully stick the column of magnets to the top of the box again this might be a little bit fiddly make sure that the sellotape is stuck firmly in place once that's done take your nail and string and hold the nail close to the column of magnets as you do that you'll feel that it starts to attract to the column of magnets that's because the nail is made of iron and as we know iron is a magnetic conductor once you've figured out the point at which the nail is attracted to the magnet put the nail down and use the sellotape to stick the string firmly in place then very carefully lift the mail back into place until it is attractive to the magnets the string will hold tight and stop the nail from being fully attracted to the magnet and make it look as if the male is hovering in midair this is a really cool experiment and it demonstrates the balance between gravity and magnetic attraction if you show this to friends you can prove that it's not a trick by running something thin like a pencil or a straw in between the nail and the magnets you can even take the nail down and put it back into place it will hold just as firmly why don't you see how much effort it takes to knock the nail out isn't that great you're going to need a beaker a pen and paper a kettle some bubble wrap some tinfoil a thermometer a what a pair of scissors and some sellotape firstly take your pen and paper oops made a mistake and write down a chart this will help you track your temperature there will be three parts to this experiment the first part we won't be using anything to cover our water the second part will use foil and in the third part we'll use bubble wrap you need to measure the temperature before you start timeing and after you've stopped timer for the sake of the experiment we want to make sure that the temperature is the same at the star still you'll kettle up with water and flick it on while that boiling prepare your beaker place the thermometer inside and then when the kettle stops boiling pour the water in take a temperature and then start your clock we let our clock run for five minutes look closely and you can see that the temperature has changed from 90 degrees to 76 degrees now let's try some tin foil what do you think's going to happen pour the water from a freshly walled kettle to the same point as you pulled it before we're doing 300 milliliters then very carefully fold up the foil to cover the water all the way up to the waterline do be careful as the water is hot start your timer and stop it again at 5 minutes what do you think the temperature will be well if we look closely we can see that it's 78 degrees slightly higher than in the first beaker now let's try again with bubble wrap prepare the bubble wrap to make sure you've got enough to cover the water once it's been poured in pour the hot water into the beaker and then use a small piece of tape to secure the bubble wrap in place start the timer and stop after the same length then take a reading from your thermometer what do you think it will say well if we look at our chart we can see that at the beginning each of the beakers was at 90 degrees Celsius but the bubble wrap after 5 minutes was still at 79 degrees this way we no bubble wrap is a better insulator than tin foil or nothing at all and helps the water to stay hot and there you have it that is insulation today we're going to show you the lemon volcanoes for this experiment you're going to need some baking soda and lemons a knife and a spoon dish soap and food dyes the first step is to carefully remove the nib from your lemon this will create a flat surface that allows it to sit still then cut the top off the other end of the lemon and using your knife now wrap the inside of the lemon a bit it's best to ask an adult to help you this part this experiment might get a little bit messy but it just makes it more fun once that's done add a small amount of food dye an equal amount of fish soap and then your baking soda you'll see that things start to bubble up if you use your knife to mix the three together you'll see that colorful bubbles start to erupt from your lemon you can repeat this again this time try with a different color you could try mixing the food dye and the dish soap together then adding the baking soda in this experiment I try pouring a little bit of extra lemon juice on top to see what happens as you can see very quickly creates more bubbles what's happening here is that the baking soda is reacting with the lemon juice inside the lemon the food dye helps us to create a more colorful explosion and this show helps the bubbles to stick together for longer you can try placing some food dye on the edge of your volcano see if it helps it to become more colorful this is a really fun experiment because you can try it in all sorts of different ways with different colors I think it looks really cool you can repeat the experiment and put them all side-by-side have a volcano race and see which one erupts the cricket so forget you can add some lemon juice or some vinegar for the top this will speed up your experiment and that's how you can make your own lemon volcanoes today we're going to show you magnetic black sand you're going to need some rubber gloves some goggles a small container cling film a glass some magnetite and some magnets firstly take a few spoonfuls of the magnetite and put it inside your container spread it out along the bottom of the container then slowly bring your magnets up against the other side of the container you'll see that the magnetite is attracted to the magnets as it gets attracted to the magnet you'll start to see that it actually starts to look like black hair now let's have some fun take some cling film and wrap your magnets up in it this will stop them from getting too dirty then dip your magnets inside the magnetite and pull it out you'll see that it creates a really strange pattern it looks like the magnets have grown a strange black fur if you dip it in again you'll see that the magnetite attracts to the whole magnet this happens because magnetite is a mineral that contains iron iron is a metal that is attracted to magnetic fields and so the magnetite is attracted to the magnet you'll see that you're able to pull some of it off the magnet however the pull is so strong that you will never be able to get all of it off you'll find as you're playing with it that very small amounts of magnetite transfer to the surface of your gloves and to the table you can see that you're able to use it a little bit like a piece of chalk if you swirl it around inside the container you can make some really strange shapes and observe how the magnetite behaves when you use the magnet in different ways make sure you're quite careful with this one and it can create quite a mess there you go that's how you can play with magnetic blacks and today we're going to show you sodium hydroxide plus foil you'll need a spoon some tin foil a beaker of water and some sodium hydroxide first open up your tin foil and tear off a sheet then break that into smaller pieces for this experiment I thought I'd fold up the pieces into different shapes this first one is loosely folded the second is tightly the third is folded flat and the fourth is in a different shape then take your beaker of water and stir in a small amount of sodium hydroxide I just used about two tablespoons once it's mixed in properly the liquid will go clear then all you need to do is put the tinfoil into the mixture very quickly you'll see that the water will start to boil steam will come off and will be a really visible reaction this is amazing I didn't expect this at all but you can see that over time the liquid completely dissolves the tinfoil and so I saw what if we use a bigger piece of tinfoil and yes you guessed it there's a much bigger reaction look at that the mixtures going crazy what's happening here is the sodium hydroxide is reacting with the metal in the tin foil and it's starting to break it down if we pull the foil out with the spoon you can see steam is coming off because heat is produced in the reaction and there you have it that is sodium hydroxide plus foil for today's experiment we're going to be making a post-it note waterfall all you're going to need is some sellotape and some stacks of post-it notes firstly take your post-it notes and separate each of the colors take the first two sets of notes then using some sellotape that's rolled over on itself or some double-sided tape click the next pair of post-it note packs on top make sure that the folds of the packs are not on the long side but on one of the short sides when you look at the packs from the side you should be able to see as edge shape then put them on top of a box or chair and gently pull the top over and watch it go it creates a really awesome waterfall effect where the colors change as they fall the post-it notes seem to fall so fast that they blur it's hard to keep up this works because the place that the notes are falling into are lower than the place they're falling from when you pull the top of the notes down they start to fall and their weight to pull the rest of the notes with them creating a waterfall and there you go that's how you can create a post it note waterfall today we're showing you the Mentos skateboard you're going to need a small skateboard some Mentos a roll of tape and a bottle of coke firstly take your bottle of coke and lay it onto your skateboard have someone help you hold it in place and then tape it around the board so that it's nice and secure you need to make sure that the bottle stays in place once you're sure that's done take it outside go into a wide clear area and drop a few of the Mentos inside the bottle of coke as you can see the first time I did this it was a total fail so what can we do to help it well my theory is that it can create a smaller hole for the liquid to escape the pressure will be higher and the bottle will launch fiber I'm also going to try and make a loading mechanism out of the Mentos packet let's remove the paper part roll up some Mentos tape one end close and then twist the other end now let's get outside and fly it again remove the cap make sure you're ready to go place the Mentos to the side screw the lid on and off we go it worked that's a great way of showing the Mentos and Coke reaction today we're going to show you how to make an underwater candle you're going to need a knife a long candle a jug of water a transparent bowl and some matches don't forget you'll need some adult supervision firstly take your long candle and measure it against the side of the bowl use the knife to make a mark where the top of the bowl is once that's done place the bowl to one side and very carefully cut into the candle it's best to ask an adult to help you with this part cut through just enough so that you can split the candle in half and then use the knife to cut through the wick make sure you still have a little left at the top this should give you a short candle light a match and then light the candle once that's done turn the candle on its side and drip some wax into the bottom of the bulb this will help hold your candle in place stick the candle into the waxed hold it in place blow the candle out and let it sit for a few minutes then pour some water into the bowl the water line needs to come all the way to the top of the bowl so keep filling it up until there's no more room the candle should just be coming over the surface of the water then relight the candle sit back and watch this experiment take some time but we've sped up our video to show you it's a bit quicker over time the candle will burn down and then when it reaches the water line the candle will seem to disappear if you give it even more time the candle will continue to burn if you leave the candle long enough the flame will go through loads of water line the water around it will keep the size of the candle cool and stop that wax from melting which in turn forms a wall around the wick of the candle stopping it from being put out by the water why don't you see how long you can get the candle to burn and how low the wick can go you could try it with thicker candles or thinner candles I think this is a really simple and fun experiment and there you have it that's how you can make your very own underwater candle so this you're going to need a ruler a pair of scissors a marker pen a USB cable a scalpel or a sharp knife a motor a CD some strong glue electrical tape and the Tupperware lid firstly take your CD and use your ruler to mark some straight line on the surface place the ruler along the center of the CD draw a line all the way across then turn the CD 90 degrees so that you turn the CD into four quarters then draw straight through the middle twice more dividing the CD into eighths you'll notice that it starts to look like the spokes on a bicycle wheel once you've done that take the scissors and very carefully cut along most of the length of each of the lines stop when you get to the clear path of the CD it's best to cut slowly as you might accidentally crack or snap the CD once that's done you'll see that it already starts to take on a fan-like appearance now it's time to use your scalpel if you have a cutting mat it's a good idea to use it now carefully cut along the edge of the clear path of the CD and then very generally break off alternate pieces of the CD so that you end up with something like this use a lighter to gently heat the plastic on the CD can then bend each of the blades of the fans very slightly once you turn it on its side you'll see it looks more like a fan then use your scalpels to cut out a small round piece of plastic from your Tupperware lid this will help us fix the CD onto our motor carefully break it off and remove any sharp pieces from the edge make a hole in the center add some glue and then carefully place it onto your motor make sure that the round piece of plastic doesn't stick to the motor itself but just a piece of metal in the center then leave that to dry apply some glue onto the CD and very carefully fix the round piece of plastic into the center of the CD and then set that to one side so that it can dry properly now it's time to get to the cable cut off the small end it might be a micro USB or a mini USB attachment then use a pair of pliers or some wire cutters to remove a few inches of the rubber lining from the end of your cable you can use your scalpel again as it's got a very fine edge and it will help you to separate the cables you might find a few different colored wires inside of your cable what you want to do here is to strip away everything except the black and the red wires this might be very fiddly so it's best to get two adult to help you once you've stripped away everything else you can use some of your tapes to tidy it up this will make the small wires easier to work with now what you need to do is expose the metal filament inside each of these wires very carefully use the scalpel to scrape away the rubber on top of the wires you can't really tell from the video how incredibly small these wires can be it might be best to use a magnifying glass if you have one delicate work like this can be very very difficult and you might get a bit impatient but stick with it until the cables look like this you'll notice that on your motor you have two wires twist the black wire onto one of them and make sure that the cables are secure you can use some of your taste to do this then repeat this with your red wire make sure that they're wrapped tightly around each other use some more tape to tidy up these wires and you're ready to carry on there we go nice and neat now all you need to do is plug your fan into a computer and look at it go let's use a clip to hold the fan in place this is a really fun and really high-tech experiment that you can do at home and there you have it that's how you can make your very own USB fan today I'm walking on eggs Oh careful for this experiment you're going to need lots of eggs now for this first round of the experiment I'm going to walk on eggs using my trainers just to see what happens I'm carefully treading onto the right-hand side box and you can see it's taking my weight now I put my left foot down and that seems okay now let's add some more eggs and see how that goes let's try this again right foot first followed by left this can be quite scary but be patient it might be best to have someone to help you you'll notice that I seem to be doing this quite easily my theory is that because I'm wearing trainers my body weight is spread more evenly across the surface of the eggs and so I'm actually able to stand quite easily on top of them you can see I only cracked a couple of them through the process three eggs out of 48 now let's take my shoes off and try again now that I'm just wearing socks they suddenly becomes a lot harder the surface of my feet is a little bit smaller and not as flat so it's much harder to balance my weight properly easy does it careful oh no that didn't work oh and there goes another one too this is much much harder when you're not wearing shoes mind you it's not impossible most of the eggs didn't break what's interesting about this experiment is it really shows you how you shift your body weight around as you move and that is walking on eggs this is a great experiment and you're just going to need a measuring jug some manganese dioxide a bottle some hydrogen peroxide a spoon and importantly safety goggles make sure that you have an adult to help you with this experiment first of all put your safety goggles on once you've done that take your jug and your hydrogen peroxide and very carefully and very slowly pour 100 milliliters of hydrogen peroxide into the jug once that's done pour that carefully into your bottle when you finish put your job to one side take your manganese dioxide and put a small amount onto your spoon you won't need much for this experiment to work roughly a quarter of a teaspoon you can see it's just a small thin film of black powder screw the lid back on to your manganese dioxide and then very carefully drop the powder into the bottle and hey presto there's your genie now is it a genie or is it science well I'm sorry to say it's just science what happens here is the manganese dioxide is reacting with a hydrogen peroxide separating it into its two ingredients water and oxygen this creates steam just like when you boil a kettle and this steam is then funneled through the neck of the bottle to make it look like a genie is emerging this happens very quickly because the manganese dioxide powder is a catalyst which is something that speeds up a reaction and makes it happen in seconds rather than minutes or hours I think this looks really cool you can see all those bubbles forming from the reaction that's the oxygen escaping from the water as they separate they produce heat that's why there's condensation on the inside of the bottle you're going to need a safety pin an egg some vinegar two glasses and a bowl firstly take your eggs and very carefully make a hole in two ends of the egg using your PIN once you've poked the pin through the shell you'll need to wiggle it about a few times in order to make a hole large enough need to blow through it also needs to be large enough so that the egg can be squeezed out through the hole on the other side very carefully hold your egg over a glass and blow into one hole you'll see the eggs start to run out the other end once that's done you'll end up with an empty egg shell next take your vinegar and fill one of your glasses you can use white vinegar or ordinary household vinegar once that's done you'll need to submerge your egg inside the vinegar because it's got air trapped inside it will start to float the trick here is to hold it under the surface so that air bubbles can escape from the egg and vinegar can fill it up you can see the small bubbles coming through the hole in the egg once that's done leave the egg to sit for at least a week we've left it for ten days once that's done remove your egg and submerge it in a bowl of water you'll see that the eggshell have become soft it feels a little bit like a small plastic bag this is because the vinegar has dissolved the eggshell leaving only the membrane from the inside of the egg because you've made holes in the eggshell you'll see that you're able to fold it up when you fold it the air escapes from the membrane however you can softly blow into one hole in the end and reinflates the eggshell or you can try throwing it around like a wall as you throw it around air will enter through the holes in both ends and will gradually re-inflate the egg you can do all sorts of cool tricks with it you can flatten it fold it in half scrunch it up into a ball and make all sorts of strange shapes it will still reinflates why don't you try playing keepy-uppy with it and see how you can do and there you go today we're going to show you the hand boiler experiment you're going to need some food coloring an elastic band a glass a piece of cloth and a jug of water firstly you need to pour some water into your glass make sure there's a small gap at the top then add a few drops of food coloring and stir it in this will make the experiment easier to see then take your piece of cloth and your elastic band stretch the cloth across the top of the glass and using the elastic band fasten the cloth tightly to the sides of the glass make sure that the cloth is not stretched out this becomes important later on then very carefully place your palm on top of the glass and slip it over you'll see that the water doesn't drain out a cool bit of science for you right there carefully hold the glass in both hands with your thumb on top of the glass and your fingers grasping the cloth then ask your friends wave their hand underneath the cloth and see how the water starts to boil how does this work well it's actually very simple as your friend waved their hand underneath the glass you need to grip the cloth and pull it towards you this stretches out the fabric across the bottom of the glass and makes the tiny holes in the fabrics very slightly bigger allowing air to go through the barrier and into the glass creating bubbles today's experiment is the invisible bottle for this all you're going to need is a small bottle a glass and a tall glass with some glycerin in it firstly pour some glycerin into your glass it should be about a third fault place the glass to one side take your small bottle and remove the cap if there is one then very carefully fill the bottle with the rest of the glycerine this might take some time once that's done place the large glass to one side and very carefully place the small bottle inside of the glass once it reaches the bottom you'll see that it seems to disappear you can't see the edges of the bottle anymore and this is because of refraction both the glass and the bottle are full of glycerin which refract or bends light in the same way this means it's much harder to see what's inside the glass you can just make out the small air bubbles inside the smaller bottles if I place my hand behind the glass you can see it's still very difficult to make out the shape unless you get very very close and there you have it that's how you can make your very own invisible bottle brilliant misting time experiment which is really great fun you're going to need four clips a glass and a smaller glass three different types of food coloring three small tubs three pipettes some liquid hand soap a jug of water and some adult supervision the first step is to take your larger glass and add a small amount of liquid hand soap then take your smaller glass and place it inside do this slowly so that you don't add too many air bubbles to the mixture you'll see that the hand soap starts to run up the inside of the larger glass then fill the small glass with water this will help to weigh it down and hold it in place take one of your clips and place it onto the rim of the larger glass take another clip and place it on the opposite side place a third clip and leave a space for the fourth then take your three tubs pour a small amount of hand soap into each of them then add a few drops of food dye into each tub to worked well for me make sure that none of the food dye gets mixed up then use your pipette to mix the food dye in with a hand soap this might take some time to do properly but it's well worth it once it's finished again make sure that the pipette do not mix take your glasses very carefully use the pipette to suck up a few drops of the food dye and soap mix then very carefully place the pipette into the layer between your large and your small glass go about one inch down into the soap squeeze some of the mixture into the liquid and pull it out again make sure that you're very careful as you do this repeat this step twice once with each color try to remove any air bubbles from the pipette before you squeeze out the mixture this will help the experiment go much more smoothly you'll see that as you squeeze the mixture out into the soap it forms a small pool and then remains this is because the soap is very thick try to hold the glass very still as you do this once all three colors have been placed put your last remaining clip into its spot then very carefully turn the inner glass you'll see that the three colors start to blend together almost disappearing that's the end of that isn't it well perhaps not turn your glass back in the opposite direction and you'll see that the colors come back they haven't mixed together at all but why is this well we're still not quite sure of the exact reason ourselves but the best explanation is that when you put the three colors into the mixture they actually form three separate layers each on their own when you turn the glass each layer is spread out thinly when you turn the glass backwards again the layer returns almost to normal but they never mix isn't that great your very own homemade mini lightsabers this is a really cool experiment you're just going to need some differently colors LED lights some watch batteries to clear plastic pens a black marker and some gas a tape the first step is to unscrew the pen from its clearcase then take one of your LEDs and wrap it around the sides of the watch battery you'll know if it's the right way round when the light starts to glow take some of your tape and secure the LED light in place wrap the tape all the way around to make sure that it's secure this will also form the handle of your light saver place the clear lid over the top of the LED light and then use a bit more tape to fix that in place once that's done you can use your black marker pen to decorate the handle of your lightsaber have a look at some of the ones they use in the Star Wars films or you could try and make your own I decided to add some stripes to mine and don't forget you'll need to draw on a few buttons once that's done repeat the process with the other LED light and when you're finished you'll have two lightsabers then battle begin you can have some great fun making all kinds of different lights you could try and make sophomore double right things up in the Panther minutes you can make blue green red whatever color LEDs like you have and there you have it that's how you can make your very own homemade mini lightsaber all you're going to need is a box of matches and a water bottle make sure that there's a small amount of water in the bottle then light the match squeeze the bottle and carefully let it go this will suck the smoke from the matches into the bottle then very carefully open up the cap and squeeze if you look up you'll see that the smoke formed into rings this happens because the cap of the bottle is in the shape of a small perfect circle this means that as the smoke escapes it takes the form of a ring as the air escaping from the bottle within a perfectly round shape you can play around the dish and try to create wings of different sizes and thickness why don't you see how high the rings can go before they lose their shape and disappear why don't you try different side fossils or different size paths we keep metal liquid for this you're going to need a nail some ferrofluid a pipette some magnets a glass of water and a petri dish or just a small plastic dish with a lid the first step is to take your plastic dish and your magnets make sure you're working on a flat even surface take your ferrofluid and your pipette and use the pipette to squeeze a small amount of ferrofluid into your dish you'll see that it runs just like water or ink you can use as much as little as you like but I find it's best to start with a small amount now if you edge your magnets close to the dish you'll see that the liquid seems to move with a mind of its own what's happening is the liquid is being magnetically attracted to your magnets as you move them away you'll see the liquid doesn't move you can try this with one two three or all of your magnets to see how it changes you can try creating shapes see what happens if you put the magnets very close to each other you'll see that the liquid runs between the magnets moving on the North and South Poles of the magnet it creates this amazing and really really cool spiky shape as you can see from my hand the experiment can get a little bit messy so do be careful as another experiment you can get a paper or plastic bowl put your magnets on the bottom and then place your screw pointed upwards in the middle the magnets will hold it in place while you squeeze a small amount of ferrofluid onto the screw the magnetic field and travel through the magnets into the screw and then attract the liquid as you drop it on you can see that it creates those same spiny shapes it looks a little bit like a sort of strange flower as you squeeze more liquid on you'll see that it's corkscrews down the length of the screw if you would support water or black ink over the top of it it would simply run straight down and make a bit of a mess you can see that near the bottom of the screw when a magnetic field is just as strong it starts to create that same spiky shape as a further experiment and to demonstrate how ferrofluid is different to water you can drop some of your liquid into your glass of water then place your magnets next to the glass you'll see that you can very quickly separate your liquids it leaves a slight cloud but that's because they are mixing very slightly what's great is when this liquid touches of a part to itself it forms into one large pool this is because the ferrofluid is made up of millions of tiny magnetic particles suspended in a liquid such as water this isn't a kind of liquid you can make at home instead you'd have to buy it directly from an internet site but I think it's a really cool experiment today we're going to show you fiber optics this is a great experiment you're going to need a laser pen two bottles of water a plastic container some food coloring and some scissors first step is to open one bottle of water and put a few drops of food coloring inside screw the lid carefully back on and shake the water a few times to mix the coloring in once that's done take your second bottle of water unscrew the lid and empty the bottles you can do this in a number of ways I chose to just drink the water once that's done you can carry on screw the lid back on top take your scissors and very carefully cut along the bottom of the bottle the easiest way to do this is to make a small hole using the point of the scissors and then to cut along make sure that you have an adult to help you with this part of the experiment once that's done remove the cap and once again use the point of the scissors to carefully make a hole in the center of the cap the hole needs to be big enough for water to flow through it screw the lid tightly back on take your plastic dish your laser pen and your two bottles unscrew the lid from the bottle with the food colored water then carefully hold your empty bottle upside down with one finger blocking the hole pour the colored water into this second bottle then take your laser pen and point it into the water if you tear down the light you'll see that you're able to see the beam of light shining through the water hold it above the bottle and point it towards the hole in the lid and then remove your finger once you do this the water will start to drain out you'll also see that the red light travels along the stream of water even though the water is curving the light traveled with it but how does this work well the stream of water actually acts like a fiber-optic cable which is a cable made of thousands of glass threads these glass threads normally reflect light along the length of the cable however the water acts in much the same way meaning that your lights shined in a straight line until it reaches the end of the bottle where it follows the path of the water in a curve the water acts like hundreds of mirrors angling the light down towards its own path the food dye helps us to see the part of the light and there you have it that is fiber optics for this experiment all you're going to need is a pair of tongs an egg a glass of water a lighter and a candle the first step is to take your candle take your lighter and light the candle make sure that you have an adult present when you're doing this once the candle is lit you're ready to go on take your egg and hold it carefully using the tongs hold the egg just over the tip of the flame you will need to get the egg nice and close to the flame to make sure this works when you're close enough you'll see that a thin black layer of soot falls around the outside of the egg do this all the way around the egg putting as much of it as you can in a layer of black soot once that's done take your glass of water and slowly place the egg inside you'll see that the egg suddenly looks like it's made of silver well this is actually because the soot that coats the outside of the egg is really a thin layer of carbon which repels water and holds a very thin layer of air around the outside of the egg making it appear silver the area's not coated in soot look completely normal it's not amazing it's a great illusion to show your friends why not have a competition and see you can make the most amazing looking egg today we're showing you how to make a DIY barbecue you're going to need a tin can some pliers charcoal briquets a pair of scissors a can opener some tinfoil and a metal break firstly use the can opener to peel off the top edge of your can this will leave a sharp jagged edge around the top so you can use the scissors to smooth this out if you like it's best to get an adult to help you with this part of the experiment once you've trimmed off any sharp pieces cut down towards the bottom of the camp leaving about half an inch at the end do this at regular intervals around the edge of the can you should end up with seven or eight different pieces fold these outwards you want to make the can look a bit like a flower you can use the pliers to help you bend the metal if you need to once you've folded each of these pieces out use the pliers to bend the end of the metal up this will help to support the grill on top of your barbecue then peel off some tinfoil and lay it out inside your can this will create the base for your barbecue check that it's folded around the bottom to be secured then open up your bag of briquettes and tip a few in you shouldn't need too many place them into the bottom of the can and then a few around the edges and place the grill on top then all you to do is go outside and light it after about 10 or 15 minutes when the heat is built up you'll be able to cook anything you like like delicious hot dogs or burgers and that's how you can make a DIY barbecue today we're going to show you how to make this USB light you're going to need a USB light USB cable a clip a sharp knife a plastic bottle and some tinfoil firstly take your USB cable and cut it off about 12 inches away from the USB end you can discard the other half as you won't need it for the experiment and then using the craft knife carefully remove the rubber coating from part of the cable we'll need about 2 to 3 inches of clear space now this part of the experiment is very very fiddly you might want to get an adult to help you to do it you can see that as you strip layers away from the cable it gets smaller and smaller and smaller and it can be very delicate work once you remove the metal coating from underneath the rubber you'll see that it exposes a few different colors of wire for this experiment you only need to use the black and the red wires so you can separate those and then trim down any other colored wires you can see so that they don't get in the way once you have the red and the black wires separated you need to very carefully remove the thin rubber coating on these wires to expose the metal underneath again you can use the craft knife to do this and I would really suggest asking an adult to help you as the wires are incredibly fine about the size of a human hair the next step once these lies are exposed is to carefully wrap them around your USB light make sure each of the wires only touches one of the contacts on the USB light all the electricity will not be able to flow properly then set that to one side and again using your craft knife you can cut the bottom off of your plastic bottle you'll need to cut about three or four inches away from the bottom this is going to make our lampshade next take a piece of the tin foil flatten it out then use your craft knife to make a small hole in the center of the piece of plastic from your bottle use the knife to trim off any sharp pieces and then widen the hole it needs to be big enough so that USB light can fit inside and then using your tin foil carefully line the inside of your plastic bottle piece this will help to reflect the light from the USB this will help to reflect the light from the LED bulb once that's done you can trim off any excess and make sure there's a hole for the LED light to stick through place a small amount of glue around the outside if you'd like to make sure that the bulb stays still if you cut your hole correctly you shouldn't even need the glue Bend the contacts on the bulb to the side and then slot it through the hole if you've used glue let it dry if not you can always stick a piece of tape over the back to make sure it stays in place and now our bulb is in the center of our lampshade all that's left to do is to plug the USB into the connection on your computer and then we can see the light bulb has popped on brilliant if we dim the lights a little bit you can see our lamp in action you can then use your clip to fix it to the side of your computer screen and that's how you can make a USB light today we're going to show you how to make a lego USB stick you'll need a craft knife a USB stick a pair of pliers some Lego firstly take the USB stick or flash drive as it's also known and separate the casing from the inside you won't need the casing just the inside part that holds all the information next take your LEGO pieces and find a piece that will fit the inside part of your USB then using the pliers you can twist out any of the pieces of plastic from the inside of the block this will make a space for the workings of your memory stick you can use your craft knife to remove any other difficult pieces make sure you have an adult to help you with that concept we experiment working on the blocks can be quite fiddly and the knife can be sharp once you've removed enough from the inside of the block it's time to make a slot for your USB memory to go through using your craft knife carefully make an incision on the short side of your Lego block you can start small and get bigger this is the best way to make a slot that will very snugly fit the workings of your USB Drive keep going until the gap is just big enough to slot your USB through great that's in place now we need to fix another piece of Lego onto the bottom to make sure that nothing can get to the workings of your memory stick I'm going to use a small amount of glue to make sure that the block stays in place but because of the way Lego works it should be enough simply to stick the block onto the other one and there you have it all you have to do is plug that into your USB Drive and you're ready to go great that's how you can make a Lego USB Drive thanks so much for watching I hope you enjoyed the experiment don't forget to check out our channel for more exciting science videos and to leave us any comments about what you thought bye for now

Author Since: Mar 11, 2019

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