Last year, my daughter and I carved a couple pumpkins using templates I got off the internet (You can buy a kit at most grocery or discount stores, but I found a printed pattern + a thin, long nail to punch the design + small paring knife worked about as well, and was free.)
Here are some sites to check out if you're interested:
This one has emoticons as well as more traditional halloween designs: http://www.jack-o-lantern.com/
Scroll down the page to see the patterns you can print for free (they also sell patterns): http://byroads.com/magazine/pumpkins/patterns.html
Here's a page with lots o'links: http://familyinternet.about.com/od/halloween/Halloween.htm
Free patterns for pumpkin carving
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