Adults need fiber in their diets to help prevent certain illnesses such as diabetes and heart disease. But what about children? While fruits and vegetables are great fiber sources, there are also supplement options available for picky eaters. Pediatrician Cindy Gellner, MD, talks about the role of fiber in children's diets and its impact on their health. Dr. Gellner also shares how to use the "Rule of Five" to determine your child's daily fiber requirement.