The parents in Overland Park, Kan., were fed up. They wanted their children off screens, but they needed strength in numbers. First, because no one wants their kid to be the lone weird one without a phone. And second, because taking the phone away from a middle schooler is actually very, very tough.

“We start the meetings by saying, ‘This is hard, we’re in a new frontier, but who is going to help us?’” said Krista Boan, who is leading a Kansas City-based program called START, which stands for Stand Together And Rethink Technology. “We can’t call our moms about this one.”

For the last six months, at night in school libraries across Overland Park, a suburb of Kansas City, Mo., about 150 parents have been meeting to talk about one thing: how to get their children off screens.

It wasn’t long ago that the worry was that rich students would have access to the internet earlier, gaining tech skills and creating a digital divide. Schools ask students to do homework online, while only about two-thirds of people in the U.S. have broadband internet service. But now, as Silicon Valley’s parents increasingly panic over the impact screens have on their children and move toward screen-free lifestyles, worries over a new digital divide are rising. It could happen that the children of poorer and middle-class parents will be raised by screens, while the children of Silicon Valley’s elite will be going back to wooden toys and the luxury of human interaction.