Links to various Rube Goldberg examples:
http://www.youtube.com/watch?v=OITcsWFi31E&feature=fvsr
http://www.youtube.com/watch?v=lCYg_gz4fDo
http://www.youtube.com/watch?v=RouXygRcRC4
http://www.youtube.com/watch?v=7_4VZOjKRxA&NR=1
http://www.youtube.com/watch?v=M7CcbfBX07c&feature=related
http://www.youtube.com/watch?v=1kvdq8cRNBM&feature=related
http://www.youtube.com/watch?v=-cPBNMe0TOE&feature=related
http://www.youtube.com/watch?v=5iIZpnBpTfU&feature=related
http://www.youtube.com/watch?v=mHHUOWz0P4o&feature=related
http://www.youtube.com/watch?v=7tTNOX8jfno&feature=related
http://www.youtube.com/watch?v=pX8fpPf7Y0g
http://www.youtube.com/watch?v=qybUFnY7Y8w
Below see classroom examples from 2008-9, 2009-10, and 2010-11!