DIY Discovery Model Motor Engine KitMotor head! Let your little angel unleash their engineering skills with Model Motor Engine Kit. This mini replica of a classic four cycle internal combustion gasoline car engine teaches young minds all about the wonderful world of mechanical engineering in one immersive set. There are all the tools included in the set they need to succeed. Let them tinker with the cranks, pulleys, belts, and exhaust valves to make this little gadget come to life.