3D Wooden Puzzles DIY Marble Run Model TK offering a unique and educational

offering a unique and educational alternative to TV and console entertainment

Unique Design: Features a gravity track ball model with a tenon-and-mortise structure

The detachable steering ring provides comfort for both right and left-handed users

and durable

and perfect for gifting to wood-loving friends and family

3D Wooden Puzzles DIY Marble Run Model TK offering a unique and educationalMIEBELY Electrical 3D Wooden Puzzles Adults DIY Marble Run Model Craftsmanship: The Miebely 3D wooden puzzle model set features 235 small wooden blocks with precise laser cutting to ensure smooth assembly. High Quality Material: Made of high quality basswood with 3mm 4mm thick wood blocks for stability and durability. Easy Assembly: Comes with a detailed English instruction manual and marked puzzle pieces for quick and smooth assembly. Unique Design: