This mini replica of a classic four-cycle internal combustion gasoline car engine teaches young minds all about the wonderful world of mechanical engineering. They'll tinker with the cranks. pulleys. belts and exhaust valves to make this little gadget come to life right in front of their eyes. This replica engine delivers the action of a classic car engine thanks to the powerful pistons and interactive cables. Simply plug the cables to the battery pack distributor and watch the engine fans turn around!