Eight of the best mechanical minds in Japan collaborated to assemble the Great Ball Contraption at the 2025 Japan Brickfest. The goal is to design the most elegant and mesmerizing methods of moving tiny basketballs and soccer balls a few inches further down the line. The result is 49 LEGO modules that, when strung together, created a circle of the room more than 31 meters long!
The elements of this contraption include elevators using genius handoffs; robots that resemble birds, dinosaurs, and, uh, robots; and gear assemblies that look like some kind of voodoo is going on. There's even one sequence in which a ball must be thrown through a basketball basket to proceed. Don't miss the colorful valley, designed to be pretty and move impressively. You might also notice a domino machine that doesn't seem to have anything to do with moving the balls, but it's pretty clever anyway. -via The Awesomer