Sunday, October 21, is the worldwide hexaflexagon party in honor of Martin Gardner’s birthday. Gardner’s article about hexaflexagons launched his career as a recreational math guru who inspired people all around the world to love math.
Here’s how to join in the fun:
Hexaflexagon History
Hexaflexagons 2
Hexaflexagon Safety Guide
Discover more flexafun at The Flexagon Portal.
G4G is an annual celebration of math in honor of Martin Gardner, long-time author of the Mathematical Games column in Scientific American.
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I love hexa-flexagons. They are one of my favorite math club activities with older students.
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“HexaFlexaParty This Weekend!,” copyright © 2012 by Denise Gaskins.
Denise Gaskins' Let's Play Math 
I have been making these for hours now! Fun! Thank You!