The idea of "Art" was born of my Mom's imagination.  Art is a naughty little 3rd Grader who puts his special touches on everything.  He graces the back of each card with his bandaged knee and dripping paint brushes.  While you can take "3rd Grade Art" to mean whatever you like, i.e. it looks like a third grader drew it, or it's not of the highest quality (or both), I don't want to insult third graders.  Most of them draw better than I do.