Recent article [PDF] in American Psychological Association identified four types of positive impact that video games have on the kids who play them: cognitive, motivational, emotional, and social.
A Platform for Good. 29 May
What Every Parent Needs to Know about Video Games - A Crash Course http://goo.gl/s2BZ9M
Guardian 2 June
Articles for parents that cover: know what your child is playing, learning from the gaming experience, the culture of the game, sportsmanship, when is it OK for children to start playing video games? and setting limits.