Ish by Peter H. Reynolds

 This was a cute book about a little boy who loves to draw, and he draws quite a bit. One day his brother looks at his drawings and says that it doesn't look like what he was trying to draw. The boy looks at it again and agrees with his brother and he gets mad. I forget if he keeps drawing or not, but at one point he crumples up his 'last drawing' in frustration and swears to never draw again. His sister grabs the drawing and runs to her room. He chases her and when he goes in her room he sees all of his drawings. He asks why she kept them as they don't look anything like what they're supposed to, a vase. She replies, 'Well it looks vase-ish'. He looks around and agrees that it does look vase- ish. and continues drawing. 

The guy's drawings don't have to be perfect. He draws because he loves it, not because he wants to make perfect pictures. It's sweet.