Octopus thief gets in the way of Science!. Warning: banjo. (via) ETA: link fixed
How to invent hexaflexagons during math class if you're Arthur H. Stone -- if you aren't, you only get to make them. (And no, you don't get to invent them outside of math class, either.) (via)
---L.
How to invent hexaflexagons during math class if you're Arthur H. Stone -- if you aren't, you only get to make them. (And no, you don't get to invent them outside of math class, either.) (via)
---L.