15 videos of amazing rolling ball machines

From commercial kits such as the Chaos Toy or Spacewarp, to the world’s largest ball run, the 70 foot high Energy Machine in the Hong Kong Science Museum, these complicated contraptions are a classic form of Rube Goldberg Machine.

Here are a collection of videos of some of the worlds most impressive ball runs in action, including the Mark Bischoff machine that was recreated for Anthony Hopkins’ obsessive character in the movie Fracture, to one built for a one-off ending to Sesame Street.