A laboratory which helps you to understand how big transport trucks work and come into contact with principles of mechanics and engineering. Including more than 200 components, with a differential, cogs, rods, panels and lots more, to construct 10 fantastic moving models: from trucks with real steering and a grip for transporting tree trunks to a tipping trailer, from a mining truck to a fantastic new vehicle with a real functioning crane! A comprehensive illustrated manual guides the child step by step in constructing the models and teaches the basics of mechanics, engineering and how levers and gears work.