HOTUT Marble Run Trackball Model Construction Kit, 112 Pieces 3D Puzzle Wooden Set, Adult Mechanical Marble Run Wooden Puzzle with 9 Steel Balls, Wooden Puzzle Craft Set for Children 8 Years and Older

HOTUT Marble Run 3D Wooden Puzzle, Self Assemble (112 Pcs) Mechanical Gear Drive, Electrical 3D Puzzle, Mechanical Model Building Craft for Teens and Adults

UGEARS Wooden Marble Run Chain Hoist - Mechanical 3D Wooden Puzzles for Adults, DIY Model Kit Crafts for Adults, Unique Puzzles for Adults - 3D Puzzle Marble Game Gifts For Puzzle Lovers - 400 Pcs

iDventure DIY Wooden Marble Run Mode Dragon – 3D Mechanical Wooden Puzzle Model Kit für Adults and Teens Hand Cranked Mechanical Gear with 15 Steel Balls