When did he become professional?

How does it happen that one day your kid is just a doodling kid and then he starts to turn out work that looks absolutely professional?
Art by Brady Johnson. Download pdf of full layout here.
Blue Skunk readers get the pleasure of seeing some of Brady's drawings each time they view this site. The skunks in the 30 or so different headings that rotate every couple weeks are all his work, some of the originals now over eight years old. Brady's work has also graced the cover of KnowledgeQuest conference editions a couple times (2009) (2011) - thanks to Sara Kelly Johns. He did the illustrations for my book School Libraries Head for the Edge - which has sold in the dozens of copies.
But seeing the drawing above - an college art class assignment that required a Ray Bradbury poem to be illustrated - has gotten me really excited about revising and updating Brady's and my first collaboration effort from 2004 Machines Are the Easy Part; People Are the Hard Part. The text will probably still be lame, but the illustrations will be great!