This set contains 12 brightly painted train cars, all equipped with two strong magnets. Works with Thomas and all major wooden train track brands. Also included is A special adjustable crane for picking up cargo. A magnet attached to the end of the crane arm will lift removable cargo blocks that it comes in contact with. Three 3 Train Cars Consist of Removable Cargo Tops cargo. 3 of these trains have removable tops which can be removed from the tops of each train car if needed. Tiny Conductors Wooden Train Cars are compatible with all major wooden train track brands. They are non-toxic and contain no lead, cadmium, and phthalates.