Robotime Marble Explorer Swingback Wall Marble Run 219 Piece 3D Wooden Puzzle

handcrafted Marble Run set full of crazy twists and turns! Build your own intricate system of cogs, gears and wheels,and watch marbles racing down the twisting slides. Best gift and brain game for all ages.

Full of elaborate mechanisms and small tricks. The precise gear design, smooth transmission speed ratio. Each gimmick will create dozens of fun to watch. You can learn the fundamentals of engineering and structures of machines.

• a crane lifter as an elevator
• a wheel lifter to bring marbles to the top
• swingback rails, 2 straight rails, 2 curve rails
• a flip-flop as a switch to drive marbles to 2 paths
• a hand crank to move the whole system

Features:

• 219 pieces
• 6 hours assembly time
• Assembled dimensions: 25.2cm (H) x 22.7cm (W) x 20.3mm (D)