Feature: 1. Remote Control: The crane model is driven by wire remote control, and can start and stop freely. It has double lifting points and double observation hole design. 2. Brain Game: When assembling this set of 3D wooden puzzles, it will enhance children's basic science knowledge, improve their hands on ability and imagination, and stimulate interest and curiosity. 3. Fixed Pulley Drive: This model is driven by a fixed pulley block, and the lifting is realized by the tower crane's own structure and pulling rope. 4. Composite Wood: The puzzle parts made of composite wood can be spliced many times and are not easy to break, so you can play them many times. 5. Perfect Holiday Gift: This DIY kit is the perfect gift for kids. After safety testing, all wood blocks are made of wood, without chemical treatment, non toxic and non irritating, creating a safe entertainment environment. Specification: Item Type: Wooden Crane Model Material: Composite Wood Power Supply: Remote control (2 x AA battery, excluded) Uses: Handmade, puzzle teaching. Package List: 1 x Remote Control1 x Worm Gear1 x Motor1 x Motor Clip1 x Hook1 x Nut1 x Cotton Thread1 x Major Axes2 x Middle Axes2 x Short Axes3 x Belt Pulley1 x Gearwheel12 x Axle Sleeve28 x Screw1 x White Glue1 x Screwdriver1 x Sand Stick4 x Board Note: Designed for children ages 6‑14. The moment they open the package, children will absolutely love it. For children younger than that, they need to be accompanied by an adult to play such puzzle toys.