Discover the speedy swirling world of the Happy Hamsters! The Happy Hamster modular track set lets you build unique, crazy designs to keep your hamsters busy day after day. With easy-to-use pieces, Happy Hamsters, will keep littles hand busy and thinking caps on, encouraging imaginative play to keep your adventurous hamsters exploring their new world. Each day in the life of a Happy Hamster will never be the same! Just stack and let ‘em slide! Contains: Happy Hamster Speed SetAge: 3 Years+Batteries: Not required