A bit more on kids and role-playing from the observational side:
Teaching Kids to Roleplay is Only Natural
http://www.wired.com/geekdad/2008/09/teaching-kids-t/
A Starter Guide to Roleplaying with Kids
http://www.wired.com/geekdad/2008/11/roleplaying-wit/
Kids and Gaming
http://robertsongames.com/role-playing-games/kids-and-gaming
When we last left our heroes . . . Psychology Meets D & D
http://www.psychologytoday.com/blog/thinking-about-kids/201003/when-we-last-left-our-heroes-psychology-meets-d-d
