How old are we talking?
Little: - wear a dress, cut a crown out of cardboard, put tin foil on it with some jewels and wear fancy shoes. (NOw a queen)
- Dress completely in black, make a black eye mask and take a sack full of stuff you "stole"
Older : Wear prom dress, make a sash (sp) and be a beauty queen. White your face out and be a dead prom date.
- Put your head Through(!) the black garbage bag. Tie it around waist area, fill with crumpled newspaper. Glue 3 white dots on the upper side, You are now a bowling ball! (A friend of mine her mom did this one in a pinch one night!)