Animated Origami Bill by Michael Lair (watch video).
EFFECT: After discussing today's economic inflation, a dollar bill is borrowed and "inflated", transforming the bill into an Origami ball! The balloon bill then rolls mysteriously across both arms, and is returned to the spectator, who will stay up most of the night wondering how you inflated and animated the borrowed bill! Animated Origami Bill by Michael Lair (watch video)