While all the major Silicon Valley social media firms—from Instagram to TikTok—say they block children from using their apps, these senators say those efforts have failed. 

“It’s not working,” Schatz says.“There’s no free speech right to be jammed with an algorithm that makes you upset, and these algorithms are making us increasingly polarized and disparaging and depressed and angry at each other. And it’s bad enough that it’s happening to all of us adults, the least we can do is protect our kids.” 

While the measure’s…