Rubber Powered Racer of STEM Kits The hands-on activity entitled as rubber powered car enables the students to learn about energy, its types and its conversion from one form to another form. It also helps them to understand about basic vehicle design, its working and how elastic potential energy can be used to move a car. Step by step manual is provided to make their own vehicles by using Pakistan Science Club specially designed STEM kit which always been an excited and worth learning experience for them.