 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is how to turn a metal ball into a ping-pong ball. As always, adult supervision is required. What you need for this experiment is a ping-pong ball, a metal ball, a popcorn, and a clear container. So I'm going to do this trick first. You can see I have a container full of popcorn, and I spin it all the way around there, and I am going to put the metal ball out, and I'm going to shake it, but I'll show you my hands are completely free. And this is what would be considered a magic trick, as most of you guys post in the comments, but I will show you the science afterwards. So you give it a good shake and shake it up, and there it is. There's a ping-pong ball. And for all you non-believers thinking that I palmed it or put it in there as a magic trick, here it is in slow motion. You can start to see it in between the middle right there about, and there it is. You can start to see the ping-pong ball coming up, starting to rise a little higher on the left hand side, and it is up. So no, I did not set this up. It's not a magic trick. It is science, and I'll show you how I do it. So what I did is you take your popcorn, put a little bit on the base so it sits in the middle, not on the bottom so they can look under the bottom, and you want to center that. You want to make sure it's in the center and fill it all the way up. So you don't want to touch in the glass like I have there. Then you're going to take your metal ball and you're going to place it on top of the popcorn. And then from there, you make sure everyone sees that there's nothing in your hand, a ping-pong ball, and start giving it a shake, and a ball comes up. Now you've seen the magic trick and how it's set up. Now I'm going to explain the science behind it. Objects with a density lower than the fluid that they were submerged in will float, and objects with a greater density will sink. In this setup, the unpopped popcorn forms a coarse fluid. The metal ball has the highest density. The ping-pong ball has the lowest density, and the unpopped popcorn has the density somewhere in between. The fluid begins to flow when the container is shaken from side to side and up and down. The high-density metal ball sinks while the low-density ping-pong ball bobs up to the surface. If shown as a magic trick, like I did earlier, it appears that the metal ball turns into a ping-pong ball. But this is not a magic channel. It is a science channel. So now you know the science behind this. I hope you enjoyed this video. Remember to click thumbs up or to share if you liked this. And thanks for watching.