alt Hacker NewsAccess to educational material, communicating with friends and family, fun.
There huge benefits to being able to look things up, download books, talk to friends and family even if they live on another continent, playing chess or D & D online.
I think social media is net harmful (to adults too) but devices, games etc. are not bad per se.
Then you also take on the risk that brings for your childrens health and well-being. Its not a problem for the government to solve for you.