I once floated the idea of a "simplest Turing Machine" contest that limited materials to wood, nails, screws, and string. The one with the least number of parts

I once floated the idea of a "simplest Turing Machine" contest that limited materials to wood, nails, screws, and string. The one with the least number of parts wins. Each Nail and screw would be considered half a part, but total score would be rounded up. This is because people tend to consider fasteners as ancillary, but not counting them at all would create too many loopholes and oddities.