Features Wired Remote Control Unit The 3D wooden crane model is controlled by a wired remote control, which can start and stop freely. Features a dual suspension point and a dual viewing hole design. Fixed Pulley Unit The puzzle of the crane model is driven by a fixed pulley block, and the lifting effect is achieved by the tower crane's own structure and pulling rope. 【Can Be Used Multiple Times】This 3D wooden crane puzzle is made of high-quality composite wood, the puzzle pieces can be spliced multiple times, not easy to break, and can be played many times. Puzzle Game - Assembling this 3D wooden puzzle set can improve children's basic scientific knowledge, improve hands-on ability and imagination, and stimulate interest and curiosity. Perfect Gift This DIY crane puzzle kit is the perfect gift for kids. After safety tests, all wooden blocks are made of solid wood, without chemical treatment, safe and reliable, creating a safe entertainment environment. Specification: Item Type: Wooden Crane Model Material: Composite Wood Power supply: Remote control (2 AA batteries, excluded) Uses: Handmade, Puzzle Teaching Package List: 1 x Remote Control 1 x worm gear. 1 motor 1 x Motor Clip 1 x hook. 1 x nut. 1 x cotton thread. 1 x Major Axes 2 x Medium Axes 2 x Short Axes 3 x Belt Pulley 1 x Sprocket 12 x Axle Cover 28 x Screws. 1 x White Glue 1 x Screwdriver 1 x Sand stick. 4 boards Note: Designed for children ages 6-14. The moment they open the package, kids will love it. For children under that, they must be accompanied by an adult to play such puzzle toys. Package List 1 x Remote Control 1 x Worm Gear 1 x Motor 1 x Motor Clip 1 x Hook 1 x Nut 1 x Cotton Thread 1 x Major Axes 2 x Middle Axes 2 x Short Axes 3 x Belt Pulley 1 x Gearwheel 12 x Axle Sleeve 28 x Screw 1 x White Glue 1 x Screwdriver 1 x Sand Stick 4 x Board