Prisoners' Inventions is a small-press book comprising an illustrated guide to the ingenious folk-art-cum-contraband manufactured by artisans in America's prison system, from toilet-roll chess-sets to this "water lighter." This stuff makes a joke out of MacGuyver and Gilligan's Island's Professor — (often) brilliant inventions, refined by thousands of inventors who have necessity in plenty, and passed folklorically from one prisoner to another.
(via FARK)