This is the mobile I made for little G a few months ago. The cranes are hung from a bent coat hanger, which hangs on a string from the ceiling. It has afforded her hours of amusement. She loves to talk to it and wave her little arms and legs.
Total cost of this project: about $5.00 for a big package of origami paper. There was a ton left over that I gave to my brother for making origami for little G's brand new cousin.