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Small steel ball operation process:

Handicraft: The 3D wooden puzzle model set is composed of 235 small wooden blocks. The precise laser cutting technology controls the error of the parts within five microns. We finely grind each wooden block to prevent burrs from getting on your fingers, so that your assembling process is smooth.

Sturdy and high-quality material: The gravity track ball model is made of high-quality basswood, and the thickness of the wood blocks is 3mm-4mm, which makes the structure of the building blocks more stable and can also prevent you from damaging key components during the assembly process.

Easy to assemble: The Roller Coaster Wooden 3D Puzzle Craft Kit comes with a detailed English instruction manual, and we mark the serial number of each puzzle piece clearly on the instruction manual. You can complete the assembly quickly and smoothly. We strive to make you enjoy your assembly process. If you encounter any problems during the assembly process, please feel free to contact us.

Unique Design and Decoration: 3D Wood Puzzle is a great design for home decor and a challenge for those who like making models. Our entire model adopts a tenon-and-mortise structure without using any glue and tools. When you put the model on the bookshelf, its exquisite appearance will surely amaze your friends.

Unbelievable Gift: Create unforgettable and memorable collaborative moments with your kids and family while putting this high-quality handcrafted 3D puzzle model set together. The entire assembly process takes about 6 hours, it allows your child to develop his or her concentration. It is ideal for gifting to wood-loving friends and family.