r/ slp might be a better place to ask for this advice. That being said, the recommendations for the NSF are good ones. They have a great deal of literature for kids who stutter (also their parents as well). [This](http://www.stutteringhelp.org/kids) might be particularly helpful. Another group you might check out would be [FRIENDS](http://www.friendswhostutter.org/). Not sure where you're located but if you're near West Lafayette, IN, Des Moines, IA, St Louis, MO or Madison, WI there will be one-day conferences for kids who stutter, their parents and SLPs at each of these locations on October 4. Might be helpful for you. Here's a [link](http://www.friendswhostutter.org/future-events/events/) for more information.