3D Wooden Puzzles Adults Roller Coaster Marble Rail Mechanical Wood Model Building Kits

Feature: 1. DRIVE MODE: This 3D puzzle is motor driven and incredibly cool. Gears propel the marbles to the top, sending them racing through different channels 2. STABLE WOOD: 3D wooden puzzles are made from plywood material, the 3-4mm thick blocks offer stability and durability. No splinters, for lasting handmade creations 3. EXERCISE HANDS ON SKILLS: 3D adult wooden puzzles are a great design for home decor and a great challenge for model makers. Making requires patience and dexterity, which is a test of your hands and eyes 4. APPLICABLE SCENARIO: 3D wooden roller coaster puzzle is developed by professional engineers, captivates handicraft hobbyists and model enthusiast. Once assembled, become a unique decoration for home or office 5. NICE GIFT CHOICE: Mechanical model building kit is suitable for adults and special occasion like Birthdays, Xmas, and New Year, useful and practical Specification: Item Type: 3D Wooden Puzzles Material: Plywood Use: Developed by professional engineers, attracting handicraft enthusiasts and model lovers. After assembly, will become a unique decoration for home or office Battery: 2 x 1.5V AA batteries(not include) Each Board Thickness: Approx. 3 ~ 4mm 0.12 ~ 0.16in. Package List: 9 x Wood Boards 1 x Accessory Pack