Packaging tape ghosts. Okay I just tried this on my foot, and I think it can work. The link doesn't bring up instructions, so here is my how-to: Get a subject in a swim suit. Wrap shoulders and abdomen in seran wrap. Wrap the legs together (spread out for a flowy dress shape.Tape over with clear packaging tape. Cut a single line down the side, and have subject slip out. Re-tape the side. Not sure how to do a head though...
Also on these boards
done in a dark corner of the yard or porch, these can be very spooky! Drape very lightweight fabric over a wire hangar, using stuffing to hold a head shape if necessary. Tip: Bend the arms upward. (The hangar arms become the ghosts shoulders). Now hang the ghost in an area where it will catch the breeze. The ghost will sway back and forth in a very spooky way!