Spring Bots 3 in 1 Spring Powered Machines STEM Education Experiment Kit 550038

Build a motorized race car, robot, and countdown timer. All that run without batteries or any electrical power! You'll assemble these 3 models while learning about the inner workings of spring-powered devices like wind-up toys and mechanical clocks Race car drives up to 45 feet, robot walks on two legs, up to 20 feet, and timer counts down, from up to 6 minutes - Age range: 6+ (with help) or 9+ (I got this!) - Step-by-step, illustrated instructions - Learn about kinetic energy and how gears & springs function - No batteries or electricity required NEW & SEALED PACKAGE