Jack says the darndest things

Looking at Jack's artwork, I try to get him to do a bit more to it because he spent about 30 seconds on it.  I say, "Jack, can you add a little more? It needs something else. I know these things, I'm an Art Teacher." He replies, "I'm not an Art Teacher. Here, I will get out of the chair, and you sit in it. You can do it." 

 It's true.  What will he say when he's 4?!