Construct your own prehistoric 3-D dinosaur with this amazing model kit. Assemble the interlocking pre-cut laminated cardboard pieces according to the numbers printed on the pieces. Lock the completed dino onto the plastic base and assemble the circuitry, according to the diagram. Comes with fully assembled gearbox and on/off switch, wiring, battery case and more. Now you are ready to turn it on and watch the T-Rex realistically open his jaws and move his body and tail. Two AA batteries required, not included. Complete easy to follow illustrated instructions and science facts included. Measures 5½" wide x 6½" long x 7" tall when completed.