I went to the dollar tree and bought a white plastic table cloth, some ribbon (Kirsten picked purple), and a pack of googly eyes. So for only 3 bucks we were able to make some super cute little ghosts.
I cut the table cloth into squares, about 8-10 inches wide maybe. Then crinkled up a piece of a plastic shopping bag into a ball and put it in the middle of the table cloth square, pulled the cloth up around the ball and tied it off right under the ball with a long piece of ribbon. Then all we had to do was glue on the googly eyes. If you don't want to use googly eyes you could just draw some on with a sharpie.
We now have happy little ghosts hanging from our front tree.