Here is a piece I finished last summer for my prior Convention season. It has been one of the more successful selling pieces I have made so far!
The first show I presented it at I sold seven of them in the first half hour! I phoned my wife and sent her to the local print show for twenty more, then didn't sell any more that day.
It is available as a print at http://www.etsy.com/people/FriendlyBelligerent?ref=si_pr