This rugged set includes instructions to build a fully-functional Dune Buggy or realistic Tractor! Dune Buggy features rack and pinion steering, gull wing doors, a working boxer engine with moving pistons and lots of other realistic details. Tractor features 4 cylinder engine, working steering and detachable rotary equipment which spins into action when the tractor moves forward! Turn the wheels to watch the engine pistons move!