Preferred age: 3 Unleash creativity with the 166-piece set of Track Ball Magnetic Building Blocks. This comprehensive set includes 7.5CM magnetic blocks designed to create intricate and dynamic track systems. The lighting version enhances the visual appeal, making each creation glow with excitement. Perfect for children who enjoy building, problem-solving, and interactive play, this set provides endless opportunities for imaginative construction and learning.Note: Adult supervision is recommended as this toy may contain small parts that could pose a choking hazard.