We wnt out and bought a grey pumpkin when we saw Jonathan's (we got ours from Whole Foods if you're having trouble finding one). We figured you couldnt get any simpler than just arranging gourds and pumpkins. But if you want to put a little more work in (but not too much more!) try your hand at actually carving a pumpkin. You can make a classic jack-o-lantern or you can go another route and do something a little different:
What are you planning to do?
[Image from The Felt Mouse]