[benabbott]

These things are super cool, I had this domain bookmarked!

When I was bored in school, I'd make kaleidocycles (a 3d but less interesting flexagon) with a sheet of paper, a pencil, a ruler, some scissors, and a glue stick. Once I learned Illustrator I began to make some custom printed designed ones.

https://en.wikipedia.org/wiki/Kaleidocycle

[PaulHoule]

I remember kids in high school playing with these in the late 1980s.