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Argonne Rube Goldberg Home Page
http://www.anl.gov/OPA/rube/index.html
Contests for high schools.
National Rube Goldberg Machine Contest
http://rubemachine.tripod.com
Home of the Theta Tau Fraternity Rube Goldberg Machine Contest. This is the official site of the national collegiate contest.
Purdue University Contest
http://news.uns.purdue.edu/rube/rube.index.html
Rube Goldberg contest whose winner competes at the national contest.
Union College Contest
http://engineering.union.edu/RGC/
Rube Goldberg contest at Union College with pictures of past machines.