Hands Craft DIY 3D Marble Run Wooden Puzzle. Comes with step by step, easy to follow DIY assembly guide. All tools included. Average assembly time is 6+ hours. Assembled Size (in) – 12.79 x 8.42 x 8.97. Recommended age 14+. Laser-cut technology makes the wooden puzzle pieces pop out smooth with no burrs or rough edges. Non-Toxic Plywood, 253 piece set.

• MARBLE RUN: Build your own intricate system of cogs, gears, and wheels. Assembly time 6+ hours. Gear Driven. Comes with 10 Steel Marbles.
• REWARDING CHALLENGE: Highly satisfying and educational building experience. Enhance your understanding of DIY principles and improve your craft skills.
• IDEAL GIFT: Perfect gift for any occasion. Attractive appearance makes it a unique touch to your home, school, or office. Assembled Size (in) – 12.79 x 8.42 x 8.97.
• NATURAL MATERIAL: Pre-laser-cut wood sheets with well-fit parts. A two-color design with Non-toxic materials ensures you a safe building experience.
• ENGINEERING MARVEL: Full of elaborate mechanisms and small tricks. The precise gear design provides a smooth speed momentum ratio.