The American Academy of Pediatrics Media Plan can help families tackle screen and media use. Link to the page here.
Babies and toddlers under 18 months old don’t need a media plan: screen time isn’t recommended (except for video chatting).
For 18 to 24 months, screen time isn’t recommended, and if allowed, choose quality media and watch with your child.
Until the 5th birthday, recommendations for screen time is 1 hour/day, again watching with parents and being careful about the content of the quality of the program. One good option is the Public Broadcasting Service (PBS).
For older children, the AAP does not set specific time limits, but recommends that parents collaborate with the children on a media plan that limits screen time so that it does not interfere with other important activities, including homework, social time, exercise, and sleep.