Seven amazing marble machines with videos of each one in operation. Created by Paul Grundbacher.
Ryszard's "marble machine 3" in pictures More
How to build a Marble Machine board
Seven amazing marble machines by Paul Grundbacher
Marble Machine Spoon Elevator - SketchUp,Parasolid,Autodesk 3ds Max,OBJ,SOLIDWORKS,STEP / IGES,STL - 3D CAD model - GrabCAD
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Marble Machine using Peaucellier's rotary to linear linkage machanism - YouTube
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Minimalist Marble Machine « Adafruit Industries – Makers, hackers, artists, designers and engineers!