Well when I found this I didn't think about having to explain it, but here goes. So it's a large metal circle, inside are three smaller metal circles with seats, on each seat is a man playing an instrument, on either side are two men attached with bicycles that move the whole thing, the outer circle spins, but the three inner circles move a little but mostly remain static. They are playing a song, while the bicyclists move it around, they are all dressed steampunk, and the crowd is impressed.