Mechanical Computing
FTL writes "Tim Robinson has built a computer capable of solving polynomial equations -- using Meccano. His difference engine (mirror) uses a similar approach to Babbage's design. He's also created a differential analyzer (mirror) complete with a GUI. Both could be scaled up indefinitely to handle larger problems. 'Computing by steam' is possible."
Strange. I thought Mechanical Computing was in the past
No really - this is art...
I think perhaps a (finite) turing machine would be much easier. It would be simpler due to not needing random access memory.