This HOMCOM engine toy set comes with 61 pieces the mechanic gifts for kids who love vehicles. Some features include a car key with lock and horn sounds, as well as adjustable gears with sound effects ideal for role-playing games. You can also open the engine cover, replace plugs, remove the motor, check the oil and more, so children can get their make-believe repairs done. It's an engaging way to get them familiar with mechanics and how to operate vehicles safely.