The slingshot car is an excellent introductory project to illustrate how potential energy is converted into kinetic energy, and the importance of low friction.
Just be sure to watch your feet as cars go racing across the floor!
Supply List (specialty materials can be found on Amazon)
All STEM Inventions project share the same set of materials
(14) craft sticks
(4) 1/2” craft cubes
(2) 1/8” dowel
(4) Small plastic project wheels
(1) Rubber band
Hot glue gun
STEM Inventions is a project by me, Lance Akiyama. Since 2011, I've developed original science and engineering activities, starting with an after school business that I founded and operated until 2015. I've held a full-time role as the Science Curriculum Manager at Galileo Learning, where I created design thinking-based lessons and pet robots. I'm a long-time contributor to Instructables.com, and I've published four DIY project books with Rockport Publishers. STEM Inventions projects were developed in after school classes and summer camps over several years. All projects use the same set of just 20 different materials and 2 tools to make supply purchasing and management easier.