2. Color Changing
That eerie, flicking candle might be the classic look for pumpkin eyes, but there are plenty of other options when you want to light things up too. Another good one, for instance, is to use some kind of LED in order to be able to choose whatever color you want for the eyes. Why not give them glowing red eyes? Or how about an evil-looking green? Then again, you could always use a more high-tech solution and give your pumpkin color-changing eyes that slowly fade between different hues.
Don’t have an LED colored light to use? Not a problem! Another option, in that case, is to attach some transparent, colored film or paper across the inside of the eyes and mouth. This works just as well.