Hardware chess sets
The tradition of improvising a chess set from whatever's on hand is probably as venerable as chess itself. Chess culture is chock-full of sets put together from odds and ends of every description, but here I'm only focusing on sets built from mechanical and electrical bits--mostly nuts, bolts, and washers of various flavors. If you've got a good one I missed, please do link it in the comments.
If you're interested in making your own and want some guidance, Mother Earth News has a nice tutorial.
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