 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is how many paper clips can fit in a glass of water. What you need for this experiment is paper clips, a glass, and water. So I've got two experiments. This is the first experiment. I've got a eight ounce glass and I'm going to fill it completely up all the way to the rim of the glass. So nothing left over. So you're going to keep going until it's all the way to the rim and you can kind of see it just going over there, right like that. So once it's all the way completely filled, I just put a little bit more water so you can see it's just over the rim there. And now you're going to predict, guess, how many paper clips can I fit into this glass of water all the way to the rim before it spills. So I'm just using regular size paper clips. So go ahead and make a guess and then I will start. So I'm going to start putting these in, but I'm going to have it on fast motion so you don't have to see each one. And when I get to 50, I'll be able to let you see. Now you probably made it enough, predicted a number a lot smaller than it is, where we're coming on 50 right now. When I will highlight when I get to 50. So you can always run a little bit slower on YouTube to see if you really want to count. But here we go. There's 50 paper clips right there. So I'm going to continue to add paper clips, but I'm going to tell you the science behind this. So water molecules are polar, meaning, like magnets, they have a negative and positive ends. This causes the water molecules to be very attracted to each other. When you place them on a penny, like when we did an experiment placing drops on a penny, the force of the attraction between the water molecules overcomes the force of the gravity, at least for a while. And the water builds up like a dome over the top of the penny. Well, the same thing happens here with the glass of water. The surface is changing from a flat to a round dome, as you can see right here. And it finally will get to a point where it can't support it and then it will spill out. Now just a second ago, while I was explaining the science behind this, we just passed 75 paper clips. So I'm continuing to go and this is in fast motion. So you guys don't have to sit and watch the entire thing, but we are coming up towards the end here. There was my 100th paper clip right there. I only bought one box. I did not think a hundred paper clips would fit in the glass. So I was not able to have the water tip over. So that's why I'm doing a second experiment here. And I'm going to have a lot smaller cup. And so we'll be able to see how many paper clips can fit in that. So you can see right there the dome and the water surface tension that's built up. It hasn't built up enough to break. So here's the second experiment. Two ounce cup, like a shot glass, filled all the way to the rim. And then right there you're going to make your prediction this time. Now this is one fourth the size of the cup. And so we're going to make a prediction on how many paper clips can fit in this cup. So here we go. We're going to start putting the paper clips in. And there's one, two. I do have it up sped up a little bit so we don't have to watch it. So as we put them in, as you already can see the glass is so much smaller. So it's not going to be able to take as many. But here we are at 25 paper clips already. And it's starting to fill up. So one of the hardest things I had to do with this smaller cup is to be able to make sure I dropped a min right so I would be able to be able to fit as many as I could. You can start to see the surface tension build on the top here as I'm coming on 50 paper clips. But I've almost filled the entire two ounce glass. So I will continue to go as many as I can. But I have a prediction that I'm not going to be able to fit all 100 in before the water breaks because I just don't have the room to be able to fit them in. So I'm coming to the end here. I think I'm just going to finish it off. That was 60 paper clips. I might put a couple more in. But I'm definitely not going to get 100 just for the size of the cup and how many I could put in there. So I think I'm going to finish with 64 paper clips and I ran out of space. So I hope you enjoyed this video. If you did, remember to click thumbs up, subscribe, and to share. Thanks for watching.