SpringBots 3-in-1 Spring-Powered Machines

Discover the physics concepts of potential and kinetic energy as you experiment with your spring-powered machines. Easy, snap-together assembly requires no glue. The kit includes step-by-step illustrated3-in-1 engineering kit: build three self-powered models, then wind them up and watch them go! Learn about potential and kinetic energy and how gears and springs function in different mechanical devices. Race car drives up to 45 feet. Robot walks on two legs, up to 20 inches. Timer counts down from up to 6 minutes. No batteries or electricity required