Experience hands-on learning with the 4M Rubbish Cart Robot. Build your own rubbish robot for eco-engineering projects around home or school. Attach wheels, arms, even wiggle eyes, and a motor to assemble your creation. Place this little trash bin on any flat surface like your desktop or a floor and watch its lid open and close as it walks. Power your robot with one AAA battery (sold separately). This kit is suitable for ages 8 and up.