Open - all ages
- Tek Venture Chain Reaction Challenge - tekventure.org
- MIT Chain Reaction: http://web.mit.edu/museum/programs/fat2010.html
- Rhode Island: http://www.risf.net/RoboPCRM.htm
Collegiate
- Purdue Competition: http://www.rubemachine.com/
- USC Berkley: http://thetatau.berkeley.edu/rubegoldberg/
Grade School
- Science Olympiad: http://soinc.org/mission_possible_c
- Carnegie: http://www.chainreactioncontest.org/index.html
Multiple
- Official Rube Goldberg Machine Contest - Middle School (online), High School, Collegiate
Other
- Popular Mechanics - http://www.popularmechanics.com/home/how-to-plans/woodworking/backyard-genius-nominations-2011#{height:507,id:44974}#{height:507,id:44974}
- YouTube - http://www.youtube.com/watch?v=4t23Dd3WlqQ
- Tek Venture Chain Reaction Challenge - tekventure.org
- MIT Chain Reaction: http://web.mit.edu/museum/programs/fat2010.html
- Rhode Island: http://www.risf.net/RoboPCRM.htm
Collegiate
- Purdue Competition: http://www.rubemachine.com/
- USC Berkley: http://thetatau.berkeley.edu/rubegoldberg/
Grade School
- Science Olympiad: http://soinc.org/mission_possible_c
- Carnegie: http://www.chainreactioncontest.org/index.html
Multiple
- Official Rube Goldberg Machine Contest - Middle School (online), High School, Collegiate
Other
- Popular Mechanics - http://www.popularmechanics.com/home/how-to-plans/woodworking/backyard-genius-nominations-2011#{height:507,id:44974}#{height:507,id:44974}
- YouTube - http://www.youtube.com/watch?v=4t23Dd3WlqQ