Package Including: DIY Electric Doodle Robot Science Toy （Not including battery sent out together） Material:High quality plastic. Age-appropriate: 6+ year old children,teens adults. Size: As the photo shown. Quantity: 1 Pcs,each package contains three colored brushes. Note:Doodle robot is the use of eccentric devices in the rotary motion vibration and freedom to achieve without moving automatically graffiti Easy to build,don’t need screws or tools,kids can build it within 20-30 min following the detailed instructions. Great for classroom demonstrations.Kids will learn the composition and function of eccentric device. Also cultivate their hands-on ability. In the game process,can trigger the children’s imagination and curiosity,exercise their finger flexibility,let the fine movements get better development. Meaningful learning gifts for your children and family.