Yeah, the green light in the alien was so cool. I tried it with just a candle, and then with a red battery light, but the green one looked best.
Believe it or not, that is just a kids green glo-stick. The kind you snap and shake and it glows.
Yes, I did those myself. I was very proud of them. They weren't too complicated, but there was enough detail to make them fun to carve.