There's No Such Thing as Bad Weather: A Scandinavian Mom's Secrets for Raising Healthy, Resilient, and Confident Kids (from Friluftsliv to Hygge)

by Linda Åkeson McGurk

Hanscom recommends as much as five to eight hours of active play every day, preferably outdoors, for toddlers and preschoolers, and four to five hours of physical activity and outdoor play for school-age children up to the age of thirteen.