Clubpenguin
Buildabearville
Fantage
Woozworld
That is all I know.
Some avatar websites that kids can use to communicate with other kids are:Habbohotel.comCCmetro (Navigate to it from mycoke.com)gaiaonline.comThese websites are monitored by adults to make sure that nothing that isn't "G" rated will go on.
imvu.com is a good one
clubpenguin.com fantage.com webkinz.com
Clubpenguin
Try Clubpenguin. It is fun for kids and you can set it up to keep them safe.
Roblox is a great one! www.roblox.com
like stardoll
here are some avatar websites for teensMeez.comImvu.comsorry i cant remember more IMVU is a fun website.
minecraft
IMVU.com
Playjumpstart.com
bestonlinegamesever.webs.com addictinggames.com