With a family of passengers, interchangeable wheels, tires, roofs, body blocks, and removable connectors, these "simple" cars will provide endless hours of fun as he or she changes the look of these fascinating vehicles. Guaranteed to stretch a child's imagination and creativity. The body of these vehicles are solid maple wood with lacquer finishes, terrific colors, and the tires are quality injection molded PVC rubber. A valid driver's license is not required, but it wouldn't hurt!