 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is the ping-pong ball physics trick. As always, adult supervision is required. What you need for this experiment is a ping-pong ball, a two liter bottle, a glue gun, and a straw. To set up this experiment, I just took a two liter bottle and I cut it off right at the edge where it starts to go straight up there. And then I took the lid off and I drilled a hole the size of the straw. And then I put the straw in and then I took some glue gun and I sealed the straw so there's no air coming in and screw it on. Cut the straw off to about the length you want it and then just put the ping-pong ball in. And that's how you set it up. Welcome back to Kids Fun Science. My name is Grace and ping-pong with a funnel. Yeah! All right. So we're going to be doing a funnel experiment again. So this time what we're going to do, Grace doesn't know, but she's going to have to do is it's very simple experiment. I'm going to put a ping-pong ball in there and she could blow soft or hard, but just blow it out. Okay? So go ahead and give it a try. Straight up. You can't tilt the sideways. You can blow hard. You don't have to blow like a little baby. What? Are you doing it? Is there glue? Okay, let's see if it's glue for a second. No, it's not glue. Are you blowing hard? Yeah. Are you blowing? Yeah. All right, give it a blow. Hey, I did it! No. No, no, no, no. It's hard, huh? No matter how hard you blow, you're never ever. No, that's jumping. That's jumping. No matter how hard you blow, you can never get it to come out. So part of the physics trick here is when we put the ball into the funnel here and we blow into the straw, is we create the low pressure coming up and then the high pressure is always pushing down on it. Therefore, no matter how hard Grace tries to blow into the straw, she's never ever going to be able to do it. The harder she blows, the more low pressure she creates, and the more high pressure pushes down on it. So as hard as she blows, she's never going to be able to blow that out because the low air pressure right here, she's blowing up, the high air pressure pushes down on it, and she'll never ever be able to spin it. Short breaths, and that's a jump. We don't want to do that because that's not what the experiment's about. It sounds like a motor. It does. Do the little ones? It's moving it.