The amount of physical activity children need depends on their age. See recommendations for ages 3 through 17.
The Latest Physical Activity Guidelines for Maximum Health Benefits
Physical Activity Guidelines for Americans, 2nd Edition
Importance of Regular Physical Activity for Health
Treating Childhood Obesity With Activity - PT & ME
Directly measured physical activity of children and youth, 2012 and 2013
Parents should encourage physical activity
How much physical activity do young children need?
4.2: How I Can Stay F.I.T. - K12 LibreTexts
How Much Physical Activity Do Children Need? - StoryMD
How Much Exercise Do Kids Need? - Baton Rouge Clinic
Exercise for Children
How much physical activity do children need?
Exercise - Philadelphia FIGHT
The types and levels of physical activity and sedentary behaviour of Senior Phase learners in Potchefstroom - ScienceDirect
Physical activity for children and youth