Games of Chance
After spending more time and money than I have—designing various chance cards, inserting bearings into laser cut plastic discs and cutting wood—I built a biased wheel. It has a slight wobble, which causes it to stop in or around the same position every time. No good for generating random results.
After spending a day pulling my hair out and getting back to the drawing board, I found a great article about Murphy, a Random Mechanical Cascade Machine, built in the late 1970′s to test theories of chance and randomness (and the difficulties that man has in playing along).
Read the article here