Uncommon GoodsDIY Gamer's Gear Ball Challenge Build Kit

Part build kit, part game-night legend, this hands-on puzzle is where old-school arcade vibes meet modern-day marble run mayhem for a fully interactive tabletop challenge. Your mission is to assemble the machine, then guide a metal ball through high-speed stages using a system of knobs, levers, and switches—no screens, no batteries, just gears, gravity, and mechanical gameplay. The kit includes 653 precision-cut pieces to build a working mechanical marble run shaped like a retro-style game controller, with six dynamic challenges featuring elements such as a sky track loop, jump ramp, separator wheel, high-speed conveyor, and ejection cabin. A successful run raises a flag and rings a copper victory bell, and the build is designed for hobbyists, families, STEM learners, and others who enjoy hands-on projects.