American Academy of Pediatrics is the world's largest association of pediatricians. Its 57,000 member pediatricians dedicate their efforts and resources to the health, safety, and well-being of infants, children, teenagers, and young adults. Michael I. Reiff, MD, FAAP, is an associate professor in the department of pediatrics at the University of Minnesota School of Medicine. He lives in Golden Valley, Minnesota. Sherill Tippins is the author of "Two of Us Make a World" and the coauthor of "The New Mother's Guide to Breastfeeding" and "Guide to Toilet Training." She lives in Brooklyn, New York.