Great Ball Contraptions are a mainstay of LEGO conventions, consisting of short sections of machinery which transport LEGO soccer balls from one side to another. Each builder’s machine can be connected to the next, to transport a dizzying number of balls around a display. Many builders focus on the all-important task of getting the fundamental mechanics working smoothly, but we’re seeing more and more builders take some time for the aesthetics as well. One such example is this enthralling contraption by chumuhou (楚沐猴), which has a fantastic steam-age industrial vibe. Check out the video to see it in action, too!