• NEW MARBLE RUNS: This wooden 3D puzzle hand crank drive uses a large gear to move the ball to the top and then rolls to the bottom via the track.This wood STEM puzzle is a fun stress reliever toy that lets you enjoy the puzzle process while exercising your hands-on skills, thinking skills, and observation skills.
• COOL DECORATION GIFT: This 3D puzzle toy is not only a toy but also a craft, you can put it on your bookshelf as a decoration. This DIY model kit is a perfect gift for birthday, Christmas and Father's Day, you can give it to your lover, husband, wife, friend and father.
• FUN TOYS FOR TEENS: The manual mechanical marble run is suitable for adults and teens who like challenges, it may take a few hours to make a jigsaw puzzle, but after assembling this wooden 3-D puzzle, you'll be overwhelmed with joyful pride when you see the constantly rolling balls on the runway.
• HIGH QUALITY: This wooden building toy is made of high quality basswood plywood. The wood marble maze is precision cut by machine and is burr free and very safe. The exquisite instruction manual makes it very smooth for you to complete the assembly.
• AFTER-SALES: If you encounter any assembly problems in assembling this wooden toy, please don't worry, you can contact us and we will provide you with solutions.