 The purpose of this research study is to see if prescribing an open label placebo to children with functional gastrointestinal disorders will help improve symptoms and their overall quality of life. Open label means youyour child are aware you are taking liquid placebo drops and not an active medication. Symptoms associated with functional gastrointestinal disorders FGIDs of children and adolescents are commonly encountered symptoms in general pediatrics and pediatric gastroenterology. The FGIDs the investigators are studying include functional abdominal pain, irritable bowel syndrome, and functional dyspepsia. The liquid placebo drops contain no active medication. 