2023 New Electric Automatic Wooden Marble Run Model Building Kits, 3D Puzzles for Adults &Teens Gifts for Christmas,Birthday Wooden Marble Run: Electrical 3d Puzzles build with 168 pieces and 8 steel marbles, a small wax,a package and English instruction.The wax is to put it on the gear and make it work better. Follow the manual and pictorial instruction exactly step by step. It could be assembled in about two hours with concentration and patience. Generally, it could assemble at least 4 hours in a little slow speed.The final inch is 10 *8.73*7.8. It is nice to a beginner of 3D wooden puzzles. Superb Workmanship:Electrical wooden marble run is very convenient. You don't need to keep the hand rocking the switch to run, as long as you install the puzzle, put the battery in, and the puzzle can run on its own. Wooden Marble Run is made of durable and natural woods which wouldn't easily deform and this product does not need glue to put together. There are precisely laser-cut and fit well together. The edges of the parts are polished and smooth. The whole product looks beautiful. Premium Pakcage: After construction it can be an unique decoration for office or home. The Ideal packaging is a good gift to friends or family at birthday, Thanks Giving ,Christmas or any holiday and festival.This is a small gift that can boost a relationship. Ability improvement: Building the 3D wooden puzzle could improve the logic thinking, creativity and eye-hand coordination. In the process, you would be quiet. Not only relaxing your mind but also forgeting all the pressure while building. Maybe it is a challengebut you could get surprised and satisfied after you finish it. After-Sale Service: If you have any questions ,please feel free to contact us and we will reply you within 24 hours. We are always here