Toy Cubby Kids Toddler Party Retro Magnetic Light-up Rail Twirler - 2 Pieces Magnets allows the wheel to adhere to the rails, making the wheel twirl to the rails by just flicking of your wrist. Wheel measures up to 2 inches and the rail measures up to 10 inches and also batteries included. This magical piece will love by children especially at night Once the wheel touches the rail lights will turn on and creates an eye-catching spinning lights as the wheels spins along the rails. Perfect during holiday season and also this would serve as a great gift for children ages 3 years and above. Helps your children in their learnings on how magnets work creating an atmosphere of curiosity and making them motivated in discovering the magic of this toy.