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 have been making these for hours now! Fun! Thank You!