Tie a scarf around your hair and use some nail polish. Dark colors are
good. Wear a flowing dress. Color? Doesn't matter.
Take a ball and
cover it with foil. Voila! a crystal ball.
Optional: Put some baby
powder on your face for a somewhat scary effect. This is the CHEAPEST
costume I know how how to make. Usually people don't need to buy
ANYTHING. Hope this helps.
Thanks to an anonymous submitter for this great idea!!!