Toddler: A young child who is learning to walk with short unsteady steps. The word toddle is of unknown origin. SLIDESHOW ADHD Symptoms in Children See Slideshow From Parenting Resources Do Children Get Ulcerative Colitis?What Every Parent Should Know About Lice Featured Centers Good and Bad Foods for PsoriasisVideo: Getting Personal on Life With MS Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19