https://thenextweb.com/google/2019/08/29/youtubes-adding-more-age-gates-to-youtube-kids-this-should-go-well/

YouTube just revealed it’s added new age categories to its YouTube Kids app, offering different videos depending on whether the child is preschool or preteen. In theory, anyway — I’m not sure I trust YouTube Kids, of all apps, to be able to make that kind of subtle differentiation.

The new age categories, outlined in the Google Support post where YouTube stealthily revealed the update, will refine those introduced last year, which separated kids into basically “Older than 8” and “Younger than 8.” Now you can select content for “Preschool” (4 years and younger), “Younger” (5-7), and “Older” (8-12). I assume at age 13 you’re expected to graduate to “real” YouTube and all the chaos therein.