Virtual worlds for teens (PG 13)

Hope that will help for you!
http://www.meez.com
http://www.weeworld.com
http://www.scapenation.com
http://www.habbo.com
http://www.gaiaonline.com
http://www.soliaonline.com
http://www.kinsaki.com
http://www.roliana.com
http://www.runescape.com
http://www.stardoll.com
http://www.fresboworld.com
http://www.zwinky.com
http://www.imvu.com
http://www.vside.com
http://www.vizwoz.com
http://teen.secondlife.com