Guidelines from the World Health Organisation (WHO) for sleep from physical activity and screen time for children differ greatly depending on the child’s age.
Children less than a year-old need physical activity, particularly what it calls “interactive floor-based play,” for at least 30 minutes several times a day. They should not be restrained in a pushchair or high chair for over an hour at a time, and rather than screen time, they should be “engaged in reading and storytelling with a caregiver” while in this position. Including naps babies under 3 months old should get 14 to 17 hours of sleep a day while those aged older than 3 months should be getting 12 to 16 hours.
Children aged 1 to 2 years old need to be physically active for at least 180 minutes a day with a variety of physical activities spread throughout the day. They should not use screens below 2 and should not be restrained for over an hour at a time. Those over 2 should not use screens for over an hour, the less the better. They need at least 11 to 14 hours of sleep in a day, including naps.
Children between 3 and 4 should have at least 180 minutes of physical activity a day including 60 minutes of moderate to vigorous activity, spread out through the day. They should not be restrained for over 1 hour at a time and have no more than 1 hour a day of screen time, preferably less. They need at least 10 to 13 hours of sleep with regular sleep and wake times per day