Learning about how to use simple physics to create the best hover craft with balloons, water bottle cap and a disc. The main goal is for students to learn how to go back and re-design. You are to teach them how make a simple hover craft but after that the students must figure out how to make their hover craft run longer and go farther distances. It will be a competition between teams and you can use the hallway to run your tests. If students get stuck give them ideas about more balloons, adding or removing weight, and balance.