Ringling Bros. and Barnum & Bailey GONDOLA #120 - O Scale. The world-famous Ringling Bros. and Barnum & Bailey Circus now travels by O gauge rail to let you experience all the excitement of The Greatest Show On Earth. Features include: navigates 0-27 curves, car length 10", durable ABS plastic shell, die-cast trucks, metal wheels, operating couplers, prototypical graphics.