Overview. Basics of childhood sleep. Pt. 1. Ages, stages, and phases. The first year of life ; Babies and sleep safety ; Sleep associations and strategies: babies ; Toddlers ; Bedtime routines and rituals ; Twins and more ; Preschoolers ; The school-aged years: ages 5 to 12 ; Adolescence: ages 13+ -- pt. 2. Childhood sleep challenges. There's a monster under the bed: dealing with fears ; Nightmares, night terrors, and other partial arousals ; Sleep apnea ; Allergies and asthma ; Headaches, leg pains, and seizures ; Abdominal/gastrointestinal issues ; Developmental disabilities and Attention Deficit/Hyperactivity Disorder.