http://www.youtube.com/watch?v=paQ10POrZh8&feature=em-uploademail-new
Vihart video Hexaflexagons 2
Hexaflexagon celebration Website: http://www.puzzles.com/hexaflexagon/
Previous Years: http://www.puzzles.com/hexaflexagon/aroundtheworld.html
Martin Gardner's post on Hexaflexagons 1956: http://www.puzzles.com/hexaflexagon/aroundtheworld.html
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