Pay attention at the end of the video - crane on nest :-)
I recommend all of Vi Hart's productions. She brings fun (and now deliciousness) to math and folding.
http://www.youtube.com/user/Vihart?feature=watch
You want to make one? Martin Gardner's book has that and many other fun things. Maybe you can get it at the library. Here is an extract from that book that has the instructions you need for this and other hexaflexagons.
