That is really cool. He has some talent and discipline. My daughter was just the same growing up and it was a great outlet for her to stay busy and have something to be passionate about. These days she sells commissions on deviant art and features a lot of her art on redbubble.com , which people then use for t-shirts, cell phone cases etc, and she gets a kick back for every item sold. It has been a great part time job and income source for her.