4M Science in Action Mousetrap Racer NEW

4M Science in Action Mousetrap Racer NEW New, unopened, still in plastic wrap. The amazing Mousetrap Racer is part mousetrap part car. It zooms along powered by a mousetrap spring. Learn how potential energy is stored and released as kinetic energy. Contains 1 large arm plate top and base, 1 small arm plate top and base, 4 wheels, 1 long axle with winding drum, 1 short axle, 1 wide (rear) base plate, 1 narrow (front) base plate with spring, 2 connecting rods, string, screws and detailed instructions. Age: 14+ years. Contains small parts. Color variations due to lighting when photographed. Offers encouraged! Top-rated seller. Fast shipping!!