Techno Gears Crazy Train STEM construction set features 60+ brightly colored interlocking plates, gears, 3-D connectors and a step by step instruction manual to guide you to the finished product. After the product is built, the Crazy Train will move across the floor and the eyes move and work, powered by the motor included in the construction set. The Techno Gears Crazy Train aligns with Science, Technology, Engineering and Mathematics (STEM) standards and is perfect for BOYS and GIRLS ages 6-12 years.