Up next in How to Do Small Science Projects for Children (25 videos)
Learn how to do two dozen science experiments with the step-by-step instructions in these Howcast videos.
Hey, guys. One of my favorite experiments is creating instruments. So many times, you don't even stop to think about how important sound is; where does sound come from? In order for sound to be made and heard, we need 3 things: You need, 1; a vibration. A vibration is something that moves back- and-forth. The source of vibration we have is here right in our throat. Then you need Source 2; you need something that the sound travels through. We live above the water, so the sound travels through the air. 3, is you need an ear, something that actually receives the compressed air. Technically, if a tree falls in the forest, does anybody ever hear it? The answer, actually, is no because you have to have an ear to hear it. I can prove this to you right now. All I need for this experiment is just a cool sheet of paper. It's actually a little thicker than regular computer paper; this is called cardstock. What I like to do is just take it and just fold it in half. I'm going to turn this ordinary sheet of paper into something extremely magical. It's going to make some really amazing sounds. It's going to prove that when you have a vibration, sound is made. I'm going to take this paper and I'm going to cut it half. Just like that. I'm going to take it and I'm going to roll it around so that I make a really cool cylinder shape. Just like that; like a telescope or a microphone. Then all I need is just a couple pieces of tape. It actually doesn't matter what kind of tape you use; it can be regular scotch tape, it can be regular masking tape. I tape one end here, and I tape the other end here. Then I need my magical paper, which pretty much every family has at home. It's called wax paper, which people use for cooking. I'm just going to take it. It's about the same size to make it easy. I'm going to cut it in half. Then a rubber band; that's all I need, and I'm going to make an amazing instrument. You're going to love the sound you're about to hear. I take this piece of wax paper. I going to take it and hold it above the cylinder. I'm going to wrap it around. I'm going to take my rubber band. I'm going to wrap it around 3 or 4 times so the wax paper is extremely tight; 1-2-3-4. My instrument is done. I made a kazoo. The cool part of this kazoo is no sound is made. No sound is made right now because you don't have a vibration, you don't have any air hitting it, and it's not hitting your ear. If you talk into it, check this out. Hello everybody. I sound like a robot. It sounds awesome, right? 1, when I'm talking, the vibration from my voice is being amplified by the wax paper and we have an extra vibration. It's traveling through the air with compressed air, hits your ear, and that's why you're able to hear. Awesome. My kazoo.