About this item ◉☞Building 3D wooden puzzle relaxes your mind and makes you forget all the pressure while crafting. A little bit challenging but really amazing once you finish it. ◉☞All you need comes in the package: 3 laser-cut plywood sheets,illustrated English instructions and sandpaper. Just follow the instructions carefully and you will be rewarded with a little piece of art. ◉☞Wowood marble run- mechanical puzzle is the model kit in the series of Wowood modular marble runs for adults and kids. Give the joy of creating a mini amusement park to your nearest and dearest. ◉☞A Cool Gift for people who like building models, working with their hands, or accomplishing the near-impossible. The challenged 3D wooden puzzle presents will test your tenacity and focus while generating excitement and satisfaction. ◉☞Contact us if you have any problem during assemblying, we would like to provide you the best solution.