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Don't let a flexigatastrophe happen to you! Happy Hexaflexagon Month, in honor of Martin Gardner. Yes, we've been encouraging recreational use of hexaflexagons and even hexaflexagon parties to happen on Oct. 21, but be sure to flex responsibly.This is my third hexaflexagon video this month. The first two are also awesome.Hexaflexagons: Hexaflexagons 2: learn more about flexagons, Martin Gardner, or hosting a hexaflexagon party, go here: stole the "hexaflexadyslexia" joke from @matthetube:'m @vihartvihart. Happy Flexing! Created by Vi Hart.