If you go to TV there are plenty of young actresses on shows on Disney Channel and Nickelodeon, but I don't watch them I don't know if any of them can actually act.
Those crappy kids sitcoms are always on at the laundromat. From what I can see, most of the actors are at least good enough to salvage really obvious laughs from really lame set ups. (But then, as an actor, I've always believed that comedy is easier than drama. Conventional wisdom says otherwise but there's a formula to comedy that's easier to refine because you get instant feedback from the audience.)