Most 11- and 12-year-olds use Tik Tok and other social media despite the platforms’ age restrictions, and many show signs of addiction to social media, a new UC San Francisco study found.

Temple parents decided to seek legal help after their 8-year-old daughter, Lalani Erika Walton, died after participating in a Tik Tok challenge—the “Blackout Challenge”—about a year ago.