 Today for our STEM challenge, I was thinking about Earth Day and how we can use recycled things from home to create something. And so I thought we could do a do-it-yourself catapult. And remember a catapult is a simple machine that uses a fulcrum so a balance and a lever. And when you put something on the end and you hit it hard enough, the object goes flying. Okay so some of the things we're going to need are a paper towel roll that you can cut in half or a toilet paper roll, a rubber band. I found this really cool just wooden spoon that we can use. And then Juliana found this sliced tomato play food that's kind of dense and heavy. Alright so let's give it a try. Okay so boys and girls let's construct our catapult. And what we're going to do first is we're going to have our paper towel roll and I'm going to put my wooden spoon on it and I'm going to wrap the rubber band around it pretty tight on both sides so that it so that we get it on there really good. Okay so now I have it attached here to my fulcrum and I'm going to add you can see that I'm going to add that silly tomato or any object you want to find from home and we're going to give it a try. Here we go in three, two, one, aha!