DESC: Build your own cardboard mechanical moving robot. -- Whizzing, roaring, zooming. Your TechnoRobot will amaze you as it runs across the floor. This construction kit is fun and easy, guiding you through the assembly of an inner mechanical engine to power your own working mechanical robot. Builds a 9-1/2" robot. -- Requires two 1.5V batteries, not included. -- Ages 9 and up.