Hasbro Sky Racers is a unique vehicle-and-track system that lets you control the vehicles and track layouts like never before. It comes with several action accessories, including SkyHook, Rescue Basket, Rescue Winch and Crane, and Sky Clamp. You can design your own track system, and the flex tracks allow you to vary the degree of turn for each curve. The vehicles are designed to be free-wheeling, so they will travel faster down hills and slower up hills. Sky Racers are safe for outdoor use during dry conditions, but never use the vehicle in the rain, as it could damage the vehicle.