Seven amazing marble machines by Paul Grundbacher
We've been staring at this mesmerizing solar-powered marble machine kit all morning…
Very cool marble run toy - it feeds the marbles and they go down different ways to play xylophone, move toys, etc. Woodworking plan to build it yourself!
Incredible Marble Music Machine | Hackaday
Ronald Walter's marble machine-click to go to site and watch the video on how this amazing machine works.
Marble Machine using Peaucellier's rotary to linear linkage machanism - YouTube
The Marbleocity Marble Machine Is Made Of Pure Wooden Goodness | TechCrunch
Minimalist Marble Machine « Adafruit Industries – Makers, hackers, artists, designers and engineers!
Ryszard's "marble machine 3" in pictures