I mentioned to someone this week, if it is "about the process and not the product, why do I have to grade the product?" At least I don't have to grade kids in preschool and kindergarten yet.
Though I do strive to make the process the most important part of a preschool lesson, I am thrilled when the product is aesthetically pleasing. It is a big bonus.
Here is a clay piece I found at the Artful Parent blog. I may have to develop a lesson similar to this for my itty bitties.