I give you the worlds simplest physical computer: https://en.wikipedia.org/wiki/CARDboard_Illustrative_Aid_to_Computation https://en.wikipedia.org/wiki/CARDboa

I give you the worlds simplest physical computer: https://en.wikipedia.org/wiki/CARDboard_Illustrative_Aid_to_Computation https://en.wikipedia.org/wiki/CARDboard_Illustrative_Aid_to_...