 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is the Kamihusen self-inflating paper balloon. It's a Japanese toy which means paper balloon. Hello. Welcome back to Kids Fun Science. My name is Grace and I'm Ken. And today we're showing you Kamihusen self-inflating Japanese paper balloon. All right. Self-inflating. But look right here. There's a hole, I get it all closed, in the self-inflating balloon. So nothing's holding the air in, right? But what we're going to do is Grace is going to bring it down, deflate it a little bit, just kind of squeeze it down. We're going to go down this way. Right there. Okay, so look. Show us sideways. It's, get the air out. And what we're going to do is self-inflate it by hitting it back and forth to each other and it will blow back up. It's pretty amazing. Yep. Here we go. We hit it up. Despite having a hole being open to the air, the paper balloon remains inflated. One might expect that the bouncing of the paper balloon would force the air out of its hole and cause the balloon to deflate. Instead of hitting it, it actually increases the paper balloon to inflate as seen here. Part of the genius of this paper is, which it is made. The paper is not only lightweight, but relatively impermanent to the air. It also is a degree of plasticity and also allows it to form easily and retain its resulting shape. Because of those properties, the balloon inflates to a volume with the air content and maintains the volume until additional air is added. As a result, the smashed balloon can accumulate air and eventually inflate to its full size from repeating bouncing. Even though the net pumping is just a single bounce, maybe very small. A balloon made of plastic, rubber, and other materials doesn't have the same key properties as paper for it to inflate like the Japanese balloon. Japanese balloon. Pretty impressive, huh? Yeah. Makes its own little balloon. So I'm gonna try to inflate it myself. The while Grace tries to inflate the balloon by herself, the pressure accompanies the oscillation. The balloon is contracted inside pressure is higher than the atmospheric pressure. When expanded, it is lower than the atmospheric pressure. The pressure difference between the balloon and the atmospheric works to restore the balloon to its equilibrium position. I hope you enjoyed this video. Remember to share and click thumbs up and thanks for watching. Nice.