Many parents worry that too much time on phones, tablets, and computers might hurt children's brains. But some scientists now say there is not enough clear proof that screen time alone causes serious problems for children.

A key reason is that Pete Etchells, a psychology professor from Bath Spa University, looked at many studies and found no strong evidence that screens always damage children's brains. He says the type of activity on the screen and how it is used are more important than simply counting hours.

Because of these findings, many scientists believe that screens are not always bad for children. They say using screens carefully, such as for learning or talking to friends, is the main advice. Experts still suggest children need enough sleep, exercise, and time with family.