Introducing the Clementoni Science Museum Mechanics Cement Truck. A fantastic motorised concrete mixer truck all to be built to experiment and also learn the most important concepts of mechanics and engineering. Thanks to the electric motor, both the rotation of the mixer and also the rear wheels can be activated for traction. 20 models of construction machines to be made with over 250 components. Including: electric motor, battery compartment, flat and conical sprockets, differential and also transmission module.