Seven amazing marble machines by Paul Grundbacher
3. Marble machine "Regenschiff" (rain ship) - 2009. The flip-flop from your marble machines inspired me to build this machine. The marble often bounced out of the machine, so I added "catch nets" made of dowels. I saw the wooden roller chain in a video by Michael Schultheiss.It was a lot of work to make this chain, but it runs without problems.