Hexaflexagons to Blow Your Mind

Whether you are particularly fond of it or not, you have to admit that when math gets involved in origami, amazing things start to happen (as we've seen in this previous TEDTalk presentation).

So imagine what would happen when origami and math meet Vi Hart's quirky style to make mathematical concepts accessible and interesting: pure awesomeness. Thanks to the following lesson on the hexaflexagon, you'll never think of hexagons the same way again...

And as if that weren't awesome enough, here's a second part: