I used LEDs taped to batteries to light the carvings in the attached pictures below. Got the idea of using LEDs for the eyes instead of xmas lights from this Instructables article.
Well... I have some red LEDs left so I was thinking of making a circular frame out of wire and connecting it to a couple helium balloons then attaching some of these throwies to the wire. Release it over a crowd of trick or treaters tonight and watch the news as reports of a UFO come in. I love playing pranks on Halloween.
![Twisted Evil :twisted:](./images/smilies/icon_twisted.gif)