3D Adult Wooden Jigsaw Puzzle Exquisite workmanship: made of wooden materials with high-gloss polishing technology. Detailed design: night city track, hard-core mechanical drive model, constructing complex track city gears, driving multi-layer tracks to move in parallel and orderly in infinite loop. Jigsaw puzzle master puzzle challenge: the craftsmanship is high, all the puzzles are assembled precisely, and can be assembled without glue. When you're done, you're a puzzle master! PERFECT GIFT AND DECORATION: This is an amazing gift for your loved ones on any occasion, especially puzzle lovers. If you want to choose a surprising souvenir for your friend or business partner, this is the best choice! See pictures for details and dimensions!