Valuable Rainbow Crayons: Package includes 15 pack stackable pencil crayons, each with 12 mini crayons in 12 colors. Sufficient quantity for daily use and sharing. Buildable and detachable design allows free disassembly and adjustment in length, can be combined into various shapes like airplanes, castles and cars. Made of high quality paraffin wax and plastic, odorless, sturdy, not easy to break, bright colors not easy to fade, recommended for ages 3 and up.flexible combination for easy holding and carrying. Increases fun in drawing and creating art, suitable as educational tool to improve children's hands-on skills, imagination and creativity. Weight: 0.53 pounds.