You could have the crane made out of a very thin memory metal, like foil and coat it in a thin layer of paper each side.
See - EASY!
Haha!
D.
[EDIT]
Also, I think the loops DVD #2 has a version that folds it even better. I'm not sure if its number 2 as I'm not home and cant reference it at this time.
Yeah, you are correct. Thanks. My brain is mush right now.I believe you are thinking of Danny Garcia's Life where the bill folds into a butterfly, flaps it's wings and then floats around a little. It is indeed in the Loops DVD #2. Cool effect...