This is one of the "faux" pumpkins you can buy at any craft store. They are made from a foam like substance and can be carved like a regular pumpkin. Here I've used one of the pumpkin carving patterns from the books you see everywhere. The one note of caution - the little bits of foam will get ALL over you when you are doing this. After I was done I added a little electric light (DON'T use a real candle as your pumpkin will melt) from the craft store and Voila! a reusable indoor decoration!
Have you gotten your spooky on today?