This project was a true test of patience.  No one warned me about how difficult it would be to work completely in clear acrylic, and I am grateful for the learning experience.  The Archimedes Screw was salvaged from a toy at a thrift shop.  The rest of project was created using laser cutters, vacu-forms, a lot of epoxy and solvent.  The belt drive is created from clear vinyl and the marbles are small ball bearings.  The project was a demonstration of different types of force and I was inspired by traditional marble runs and perpetual motion devices.