Ronald Walter's marble machine-click to go to site and watch the video on how this amazing machine works.

Ronald Walter's marble machine-click to go to site and watch the video on how this amazing machine works.

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We've been staring at this mesmerizing solar-powered marble machine kit all morning…

We've been staring at this mesmerizing solar-powered marble machine kit all morning…

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Seven amazing marble machines with videos of each one in operation. Created by Paul Grundbacher.

Seven amazing marble machines with videos of each one in operation. Created by Paul Grundbacher.

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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!

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!

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