Younger children, specifically toddlers, who spent more time staring at screens suffered delays in developmental milestones that include communication, motor skills and problem solving, according to a study from the University of Calgary.

Dr. Andrew Adesman, chief of developmental pediatrics at Cohen Children's Medical Center, says kids who are spending a lot of time on their screens are not getting as much physical activity and sleep, or are not learning through exploration.

"Ideally, parents should engage with their children around screen time," Adesman says.

Mikhail Mirza is not happy about his mother's rules on screen time. The 10-year-old's mom Almas says she began limiting it about three years ago to just a couple of hours a day, only on Saturdays and Sundays.

"No one talks to each other," says the Manhasset Hills mother. "No one concentrates on what they're supposed to do -- they just do iPads and video games and TV."

Nely Tito, of Elmont, says she allows her 7- and 8-year-olds to use their computers and tablets for less than 30 minutes a day Friday through Sunday.

According to the American Academy of Pediatrics, children ages 2 through 5 should only have one hour of screen time a day.