Ideal for future engineers to design and build a gearbox by themselves. Learn how motors and automotive transmissions work. Features Build your own walking Stegosaurus. Gear drive operation. The unassembled 2-in-1 gearbox provides you with a motor, 2 sets of gears, metal shaft and gearbox. Using the different gear sets will give you different speeds. Supplied with pre-punched board, pulleys, shafts, switch, motor, battery holder and all necessary parts. Easy to follow instructions. A non-soldering kit.