Bring the world of construction to life for kids who love to explore how things work. Youngsters with a passion for vehicles will love building this Lego Technic Concrete Mixer Truck (42112). The cement truck looks just like the real thing, with 8 sturdy wheels, a moving motor, an opening driver's cab and a large rotating drum. Kids can turn the drum manually or set it to automatic mode, which starts the rotation as they push the truck along. Turning the drum counterclockwise releases the concrete.