Whatever happened to hexahexaflexagons? During my teenage years in the Seventies they seemed to be omnipresent – probably due to Martin Gardner’s column in Scientific American.

This morning – for a reason that escapes me now – I remembered a story about a mathematician who caught his tie in a hexahexaflexagon. He tried to ‘flex’ it free, but the tie only disappeared further. As he continued flexing his tie, and eventually himself, became more and more deeply entwined. Eventually he disappeared completely, never to be seen again.

I don’t recall seeing one for maybe twentyfive years now. Whatever happened to hexahexaflexagons?

Update, 18-may-05
A brief history of hexahexaflexagons, together with folding instructions, can be found here and here.