Feature: 1. 3PCS PUZZLE SET: Set contains electromagnetic swing, magnetic levitation pen, solar helicopter. A total of 3 packs of 3D wooden puzzles for kids, which is a very interactive activity 2. LEARN WHILE PLAYING: With the fun of this project kit, will enhance children's basic science knowledge, improve their hands on ability and imagination, and stimulate interest and curiosity while assembling this set of 3D wooden puzzles 3. UNIQUE WONDERFUL GIFT: Specially designed for children aged 6‑14, Kids will absolutely love these activities the moment they open the pack 4. SAFE TO USE: 3D wooden puzzles are suitable for handmade or educational teaching, non toxic and harmless, children can use with confidence 5. COMPLETE FITTINGS: The package contain complete accessories, easy for you to install and use, you can enjoy the fun of DIY, practical and convenient Specification: Item Type: 3D Wooden Puzzles Set Includes: Electromagnetic swing(requires 2 x AA batteries, not included), solar helicopter, magnetic levitation pen Material: Composite wood Uses: Handmade, puzzle teaching. Package List: 1 x Electromagnetic Swing(2 x wood board, 1 x battery box, 1 x screwdriver, 1 x sand bar, 2 x claw nail, 14 x screw, 4 x cable tie, 1 x foot pad, 1 x copper wire, 2 x magnet)1 x Solar Helicopter(1 x generator, 1 x solar photovoltaic panel, 2 x double sided tape, 1 x bushing, 2 x wood board)1 x Magnetic Levitation Pen(2 x wood board, 6 x magnet) Note: For children younger than this, such puzzles need to be played with an adult.