This fierce-looking Tyrannosaurus Rex uses a crank arm gear box to recreate the movements of the real thing. Balancing on its thick tail, the powerful hind legs and small metal front legs alternate movement while the head moves back and forth. The pre-assembled gear box aids in the ease-of-assembly. Wooden parts are pre cut to shape. Reverse the switch, and the T Rex backwards in a humorous manor. Add light sets and other Tamiya Construction products to enhance the kit.