This Red Speedster can be used with most Kullerbu tracks. The cars wheels rest on top of the Kullerbu tracks. Allowing it to traverse the tracks like a roller coaster. Features a momentum motor. A momentum motor allows the car to travel forward on its own. Simply give the car a push along the tracks, or ground, and watch it travel on its own.; Age Range: 2-6 Years;This cool red speedster with white racing stripes has a momentum motor that allows it to travel forward on its own. Simply give the car a push and watch it speed along the tracks or any hard surface!;Discover the Haba Kullerbu play world! This colorful and innovative play system from Haba can be expanded and modified for endless play. From the clever click system to the child-friendly design, the Kullerbu world brings delight to both parents and children.;Designed for the Kullerbu Play Track System, the wheels rest on top of the tracks allowing it to travel along like a roller coaster. Please note: While Kullerbu vehicles are mostly compatible with the Kullerbu Play system, there are certain accessory pieces (such as the universal steep curve) that work only with Kullerbu balls and cannot accomodate Kullerbu vehicles.;Red speedster measures 3.5" L x 2.2" W and is made of ABS plastic. Suitable for children ages 2 and up.;Kullerbu vehicles are just as much fun off the track and can be enjoyed as a stand-alone accessory.