Those real transformable vehicles will always keep your little kids busy with their own creation, and imaginative play experience, and perfect size for little hands. All vehicles chassis are using identical uniform base, installing detachable wheel axles for future tire repairing, and also invisible hooks for turning into trailer to hook up other vehicles if needed. All chassis with even holes are designed for free construction playing and transforming. All the new transformable vehicles are designed with real construction work role playing in mind. There are so much more your kids could do and transform from those new collection.