Meccano Junior Maker System Pull Back Race Car. A new set includes 61 pieces. In this set the car is already put together and works, it rolls forward good whenever you pull it back. This set includes what is pictured, the car, the mechanism in the baggie, a white crossbar, a bolt and two loose washers. It may be missing one bolt that fits the extra nut. It includes instructions that guides you through the building process. There is more than one way to build the car. The box is in good condition, but the snap-handle on the top is sometimes difficult to close.