Artist Tom Harold noticed that many people in online forums had the same questions about getting started building rolling ball sculptures out of steel.
Seeing that no videos existed to directly address these questions, he put together the starter video shown here. This video is part one of a series that may end up being about three or four videos in length. This one focuses mostly on welding 1/8 inch steel rod. Great stuff!
You cans see more of Tom Harold's kinetic sculpture on his web site.