Feature: 1. 5PCS PUZZLE SET: Set contains mechanical lock box, floating ball, electric three ball meter, magnetic levitation pen, electric awning boat. A total of 5 packs of 3D wooden puzzles for kids, which is a very interactive activity 2. LEARN WHILE PLAYING: With the fun of this project kit, while assembling this set of 3D wooden puzzles, will enhance children's basic science knowledge, improve their hands on ability and imagination, and stimulate interest and curiosity 3. WONDERFUL GIFT: Specially designed for children aged 6‑14, Kids will absolutely love these activities the moment they open the pack 4. SAFE TO ASSEMBLE: Made of environmental friendly plywood, easy to punch. The smooth surface and rounded corners keep your kids safe while assembling these wooden puzzle toys 5. SAFE TO USE: suitable for handmade or educational teaching, wood without paint, non toxic and harmless, children can use with confidence Specification: Item Type: 3D Wooden Puzzles Set Includes: Mechanical lock box, floating ball(requires 2 x AA, not included), electric three ball meter (required 2 x AA, not included), magnetic levitation pen, electric awning boat (requires 2 x AA, not included) Material: Composite wood Uses: Handmade, puzzle teaching Paint Material: Wood without paint. Package List: 1 x Mechanical Lock Box(3 x wood board, 1 x hinge, 1 x screwdriver, 2 x 10mm screw, 30 x 7mm screw, 1 x lock buckle, 1 x lock body)1 x Floating Ball(3 x wood board, 1 x foam ball, 1 x white latex, 1 x motor, 1 x fan blade, 1 x battery box)1 x Electric Three Ball Meter(2 x wood board, 3 x foam ball, 2 x bushing, 3 x color pen, 1 x motor, 1 x sand stick, 1 x battery box)1 x Magnetic Levitation Pen(2 x wood board, 6 x magnet)1 x Electric Awning Boat(2 x wood board, 1 x motor, 1 x battery box, 1 x foam board) Note: For children younger than this, such puzzles need to be played with an adult.