Seriously, while on a picture hunt for watermelons I found this really nifty site that's dedicated to the art of watermelon sculpting/carving. The concept of carving them is rather new to me, but I'm sure any sort of fruit or vegetable could be considered a useful canvas. Especially if they're the size of watermelons( other melons) and gords/pumpkins.
Very cool watermelon art this way... Edit: Also found this site which has some great nutritional facts as well as some very great art work of carved watermelons:
Information and more awe-inspiring artwork