Animation (with no sound) of pumpkins.
How it works: After the music has been added to movie file it can be converted to a looping DVD or it can just run directly on a laptop connected to a digital projector. Only one projector is needed since all three pumpkin faces are in the movie together. Hide the projector behind some bushes or some set up tombstones and project the movie onto some fake or real pumpkins of your own. I personally use fake ones that I can use over and over every year. Plug in some PC desktop speakers and hide them as well. If this is burned to a DVD just make sure it is set to loop. If this is going to run off a laptop make sure the player is set to repeat or loop. Done!