Researchers say too much media -- or the wrong type of content -- may affect kids' health and development and interfere with relationships with family and the larger world.
The Academy previously set the screen time limit to two hours for kids older than age 2.
The academy now recommends that children 2 to 5 years of age should be limited to one hour per day.
Screen time limits by age
Experts say infants 18 months and younger should keep away from screens altogether.
Infants could be overstimulated by the lights and sounds that come from television sets and mobile devices, which may cause distress and sleep problems.
The study also found that children 2 to 5 years old should limit their screen time to one hour per day and children age six and older should make an effort to limit their screen time every day.
The AAP will hold a Facebook Live presentation on Friday to discuss its findings.
These are the statistics:
- Teens spend 9 hours a day using media
- 1 in 3 millennials hate how much time they spend on their smartphones
- 46 percent of millennials say their friends and family think they use technology too much
The AAP recommends that "parents prioritize creative, unplugged playtime for infants and toddlers," according to its press release.