Kinetic Marble Track Around The Top Of A Room

Kinetic Marble Track Around The Top Of A Room: "This Instructable is for building a marble track around the outside of a
room. This track is built mostly from wood and uses 1-inch glass
marbles. There are two lifting devices used to bring the marbles
to the top of the track and keep them moving around the room. The
lifting devices are run wi...
By: stevemoseley

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