Photographing pets, sports, and 3 year olds requires a similar set of skills. Each involves a subject that is often out of your control to some degree. I found a great background of backlit, colorful leaves, and put his favorite card in place to anchor him down. Reflectors were placed in the sun to throw some great light on him. We had 3-4 minutes to shoot him before he was off and running around the yard again.