Robotime 3D DIY Wooden Puzzle Mechanical Gear Drive Marble Run Set Gift LG503

?€?ENGINEERING MARVEL?€?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 the structures of machines.

• a crane lifter as an elevator
• a wheel lifter to bring marbles to the top
• swing back 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

?€?REWARDING CHALLENGE?€?Highly satisfying and educational building experience. A brilliant way to enhance understanding of STEM principles and improve kids?€? motor skills. This building set will put your visual-spatial skill and patience to the test.

?€?IDEAL GIFT& HOWE DECOR?€?Perfect gift for any occasion for all ages. Detailed design and attractive appearance make it a unique touch to your home and refreshing decor for your office.

?€? NON-GLUE & NATURAL MATERIAL?€?Lightweight models made of natural plywood. Pre laser-cut wood sheets with well-fit parts. No glue needed, easy to assemble together. Nontoxic materials ensure you a safe building experience.