This handbook presents one of the first clinically tested treatment protocols for Functional Abdominal Pain (FAP) in young children. Created and tested by Dr. Nancy Zucker with support from the National Institutes of Health, this intervention teaches children to become “FBI agents” (Feeling and Body Investigators) – detectives who investigate and learn to manage their symptoms. Kids develop a newfound trust in their bodies by using strategies that transform fear and confusion into curiosity and humor.