What is a reasonable limit for screen time for kids?
user
In 2017, the American Academy of Pediatrics put out guidelines, saying 2 hours or less per day is ideal, for kids age 2-5.  
For children ages 5-18, screen time should be limited to 1 hour or less per day.  
I would also say that parents are best to decide this as they feel is right for them and their kids, and that ultimately it’s important to talk with your kids about their screen time.
assistant
What is a reasonable limit for screen time for kids?
user
So first, what do you mean by “screen time”? Is it the total amount of time they’re on screens, or the number of screens they’re on?
assistant
What is a reasonable limit for screen time for kids?