Pull them back and watch them go! SmartMax Rob & Ringo allows kids to build a flatbed truck and a car and add them to their SmartMax creations! Wheels, cockpits and other parts are easily clicked onto the bars, so anyone can build. SmartMax enables young children to explore magnetism safely, with strong, oversized pieces that are specifically designed for handling by young kids. Includes 10 pieces. All pieces can be combined with all existing SmartMax sets.