Ellyn Satter Institute - Excellent resource with topics related to children and food such as: Feeding dynamics, how to feed, how to eat, weight concerns and raising children to be competent eaters. There is a small section for adults as well.
http://www.ellynsatterinstitute.org/
Intuitive Eating Pros - Intuitive eating process, reconnecting with hunger and satiety cues. The companion book has as a section for parents to work with their children from.
http://www.intuitiveeating.org/