HOW UGEARS HEAVY BOY TRUCK VM-03 WORKS\nThe “Heavy Boy Truck VM-03” rubber band wind-up motor allows it to cover a distance of about 16 feet in single setting. The transmission element makes it possible for the Heavy Boy Truck to produce forward and reverse motion, and the front sprung wheels turn to set the direction. The cabin doors open and close, and the small ladder underneath the cabin allows for more convenient access in.\n\nThe “Heavy Boy Truck VM-03” wooden mechanical model kit comes with all the parts pre-cut and ready for the assembly. Detailed and easy to follow, illustrated assembly instruction come within each kit.