The Salt Water Fuel Cell Monster Truck Kit is equipped with four-wheel drive mechanical construction. It easily handles different types of terrain by its twisted car body design. The transparent case design allows children to see the rhythm of the piston in vertical or horizontal position. Each monster wheel can change its angle individually and the truck can change its height and shape. Forward and reverse... no problem; simply switch the "positive and negative" connectors. Oh, by the way, did we mention that it is fueled by salt water? The Salt Water Fuel Cell Monster Truck gives children a chance to learn about new forms of clean energy, while building and powering their very own kit... just add saltwater and roar!