Put this robot mini vehicle together, then add salty water to the power compartment and off it goes! No Batteries required! It's amazing! Contains a set of plastic mechanical parts (assembly required), 2 carbon sheet, 2 aluminum sheets, 2 fabric sheets, motor with wires and contacts, dropper, 2 screws, axle with wheels, axle with gear and wheels and detailed instructions. Age: 8+ years. Contains small parts.