 Welcome back to Kids Fun Science. My name's Ken. Today's experiment is the Plastic Diskin Ring Apparatus Thermal Expansion Kit. As always, adult supervision is required. What you need for this experiment is the Diskin Ring Apparatus Kit, which you can find in the descriptions, two dishes, some ice and water. So I found this really cool experiment online and I put the description in the link where I got it. As you can see, it comes with a disc and a ring and they perfectly fit together, barely any gap. So this experiment really shows you the effects of thermal expansion on plastics. So what we have here is a dish on the left with hot tap water, actually microwaved just for a tad, and then I got some ice water. So we're gonna have to make a prediction. If we put the ring and submerge that into the hot water and the disc into the cold water, what's going to happen to each one of them if we place them there for one minute? Let's spend one minute and be very careful when removing it out of the hot water. Take the disc out and the ring and you're gonna be able to see that the disc contracted in the cold ice water while the ring expanded in the hot water, both because of thermal expansion, causing the gap in between the two pieces. That's pretty cool like that. That's pretty big gap as you saw from the beginning. So we're gonna continue from the first experiment. You can still see there's a gap from the first experiment right there. And so now we're gonna make a prediction. What's gonna happen if I put the ring and disc submerged in ice cold water for one minute? Go ahead and make your prediction. This is a really cool kit because it has multiple different exercises you can do where I'm only gonna do about three of them. We'll check back in about a minute. All right, so it's been one minute and we're going to remove the ring and the disc from the ice cold water. Remember the experiment before we had the ring in the hot water and the disc in the cold water and there was a gap in between. So we're gonna try to put these together to see and that's pretty impressive. There is no gap there. So both pieces contracted at the same rate in the cold water causing them to fit together without any gaps. That's pretty cool. So right back to square one where we started at. Kit comes also with a long rectangle piece right here. You can see it's flat and for experiment over three we make a prediction. What's gonna happen to the rectangle if we run hot water on one side of the plastic piece? So we're gonna make that prediction. See if you're right this time and we put it down and we can see the plastic arcs. That's pretty cool. So the plastic bends away from the hot water because the hot water causes the plastic on that side of the rectangle to expand but not the plastic on the other side of the rectangle. So we have the rectangle and it's still bent from the last experiment. So this time instead of hot water we're gonna run it under cold. So go ahead and make a prediction. What's gonna happen to the rectangle when I put cold water under it? So the cold water there. So we pull it out and we put it on the counter and we can see it's completely flat this time. So the cold water caused the previously expand plastic to contract back to its original size. Making the plastic flat again, pretty impressive. Overall this kit is really good. I love using it and we're able to reuse it over and over. I hope you enjoyed this video. Remember to click share if you liked it and thanks for watching. Okay, that video seems really interesting. Oh, and that video too. Um, I think I read subscribe button down below and.