Marble is different from competitors like Odyssey, Decart, and Google's Genie because it creates persistent, downloadable 3D ...
Moore curve marble run is a fascinating, 3D-printable project that uses a motor to push marbles. The motorized run incorporates a lift with a spiral guiding rail and steeper slopes for acceleration.
There are few things that can keep a certain kind of mechanically-inclined mind entranced as well as a marble run, and few ...