Build this truck and prepare its battery for action. Then add some salty water and watch the truck go! Contains truck body, 4 wheels, axle with gear, plain axle, battery cartridge, 1 sachet of active carbon, motor with wires and contacts, scoop, dropper, cup, 4 magnesium sheets, 4 fabric sheets, 4 copper sheets and instructions. You will need table salt, water and a teaspoon. Truck measures approximately 10cm when built. For ages 8 and up.