ROKR -EGB01 London Marble Run - Medium LevelDescription Prepare for a whirlwind tour of the British capital without ever leaving your room with this mechanical wonder disguised as a hands on 3D wooden puzzle. You get to go sightseeing with the help of precision engineering and some miniature versions of the Big Ben, the Tower Bridge, and the London Eye. Cross the Thames and board the double decker bus or the Tube and get to your destination in a jiffy, while metal spheres zip through ramps and