It is a kids' world: "Ketnet.be" (VRT) is a TV channel and an online platform aimed at 6 to 12-year olds, the website providing music, videos, games, polls, events - basically anything you might consider attractive for kids. (Including, of course, social network features.)
The main goal of "Ketnet.be" is to increase children's media literacy in a safe online surrounding. A full-blown kids' website. Uhm, nice.