Knex computer at Olin College

[s_baar]

http://knexcomputer.blogspot.com/

[ivankirigin]

Style-wise, this wooden binary adder wins: http://woodgears.ca/marbleadd/

This MIT project uses Fluidics, making computers from water: http://www.blikstein.com/paulo/projects/project_water.html

So if electrons are fire, we now have wood and water. I suppose these wind-powered walking robots complete the set: http://www.youtube.com/watch?v=a7Ny5BYc-Fs

[daniel-cussen]

Those things were once cutting-edge; I believe Charles Babbage designed one in the 1830s, and Richard Feynman worked on another mechanical computer in WW2.