How would you judge a classroom pumpkin carving contest?

Question:

How would you judge a classroom pumpkin carving contest?

and
what categories would you have

Best Answer - Chosen by Asker:

Carlos had nice criteria up there. You could consider awarding 1-10 points for each, or ranking each entry, and letting the total scores decide.

For categories, how about:
scary faces
funny faces
animals
abstract designs
best eyes
best teeth (or fangs)
best in show :-)