 Today's experiment is about surface tension. Welcome back to Kids Bend Science. My name is Ken and today's experiment is a very fun and easy experiment. So what I'm going to show you is what you need, how to do it, and the science behind it. So what you need is a cup and some water and you'll need a little bit more water to fill it up afterwards for the second part of the experiment. A credit card or a business card, some sort of hard plastic there and some coins. And I'm using pennies so you can use any kind of coin you want, just make sure the same size coin and you need about 10 to 15 of those. So I'm going to come right back and show you the science experiment and the science behind it. So make a prediction on how many coins can stack up on the card before falling over. So the first experiment I have an empty glass, credit card half over and I'm stacking the pennies on the outside and you see it only holds two pennies. Maybe I get three but I think two is the max. So the second experiment I've actually poured the water all the way to the top of the rim and placed a credit card in the same position and I'm going to see how many pennies I could stack on at this time. So therefore this time what's happening is we're using surface tension. So there's two, there's three, we've already passed up the last experiment. There's four, five, six. So surface tension is really helping out a lot here as we're 7, 8, 9, 10, 11, 12, 13. It's really passed up to the first time. 14 and 15. So actually 14 pennies because the 15th penny knocked it over. Here's a different angle here. You can see the the pennies are on the outside of the cup. Surface tension is holding the card down and try this at home and make sure you comment below how many coins or pennies you can stack on there. If you enjoyed this experiment please remember to click thumbs up and subscribe. It really does help our channel and thanks for watching.