not super creative but easy: witch- black and white striped tights, black shoes, black dress or skirt hat, broomstick
elephant: gray sweatsuit, trunk made out of toilet paper roll (to go over the nose, poke nose holes) and paper bags twisted and painted gray attach with elastic around head, you can papermache ears
alien- bobble head antenea, any funky clothes let her choose
flamingo-all pink,black shoes, curved beak made of cardboard, maybe a pink feather boa
