 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is Shrinky Dinks. As always adult supervision is required. What you need for this experiment is the clear poly-stri plastic number six oven permanent marker and a cookie sheet. As you see here I just got some Tsukou containers and they have the number six recycling number six on there and that's what you're looking for is the number six. They're also in yogurt date dating yogurt containers and you can look they had number six is two on there so once you get those and you have identified two different kinds a little small square one and a larger dinner one there's a six right there as you can see kind of it's a little hard to see but make sure you got number six and once you get that there then you're just going to cut them out either into large square or smaller squares so I'm just going to make three or four different squares here and cut them out and so you want to observe too how thin the plastic is because what we're going to be doing is on the experiment is we're going to put them in the oven and hence the name Shrinky Dinks they're going to shrink so and I'll tell you the science behind it so we'll get these cut out and then we will go from there once you got them cut out you can use a hole punch and just mark one of the corners that way if you want to make a key ring or you know put something on there you're able to do that so I just did that for a purpose to show you what it is now you guys get to see my artistic skills that's why I don't have a drawing channel and I have a science channel so I will attempt to make three drawings for you and you want to use permanent marker and I'm going to make a little house here not to be confused with my house because I do not have an apple tree but I'm going to make an apple tree here and then I'm going to make a second design I'm going to draw a flower and you go ahead and use different colors you can use whatever you want but you just want to make sure it's a permanent marker and then once I get done with my flower and then I'm going to make the last one which is going to be Kids Fun Science which is my favorite youtube channel and so once I get those all set up we are going to put it into a cookie sheet so now you can see the pieces are pretty big I'm putting all three onto one cookie sheet make sure you have adult supervision helping you set your oven at 370 degrees or 170 Celsius and put it in the oven for five minutes so once we set that up I will go through the science behind this and so the five minutes is up and we're going to pull them out make sure that they are hot so you're not going to want to touch them you're going to let them cool even though they look really cool and they've shrank down tremendously pretty awesome and we will look observe them right now after they've cooled down the science behind is well if you've ever thrown a styrofoam cup into a campfire you know that styrofoam shrinks considerably when it's heated if you have a two liter bottle and you fill it with boiling water it will noticeably shrink in size too many packets are pre-shrinked wrapped plastic so certain types of plastics that are put into windows in the winter for installation must be shrink fitted with a hairdryer polystyne tray which we're using in this experiment also shrinks when heated the reason this can be traced back to its manufacturer in order to make it into film the polystyne tray must be heated and then it's stretched and then it's quickly cooled and this locks the plastic into a particular shape and thickness so when it's heated again it becomes unlocked and returns to its original position and thickness you can see here the original piece is very very thin but it's a lot thicker when we heat it in the oven i hope you enjoyed this video remember to click thumbs up and to subscribe thanks for watching