Comes with 3 balls The Musical Ball Popper is a self-driving train toy designed for babies to promote sensory development. The toy features a popper that releases colorful balls as it drives around, engaging and stimulating young minds. With lights and sounds, this toy provides a fun and interactive experience for babies, encouraging them to reach out and touch the balls, helping to develop their motor skills. The self-driving feature adds an element of independence and exploration to playtime, making it an entertaining addition to any baby's toy collection.