You have:
Worlize
Fantage
Woozworld
SparkCity World
Stardoll
Oh my dollz
Chit Chat City
peoplewordsforkids.com
everloop
Poptropica and Club Penguin are two.
well it depends on the age to me. here are some suggestions -www.habbo.com -www.milsberry.com -www.zwinky.com -www.poptropica.com
Well u have Myspace,Twitter and Facebook.
I recommend you use myjuniorbook.com or fbfkids.com and personally I think myjuniorbook.com is better. I think www.eschoolfriends.com is by far the best.
Runescape
kidswirl
do it on facebook
FanlalaEdmodoFantageClub Penguin
facebook, reddit, twitter, instagram, youtube
kind of like Facebook for littler kids. they are usually safer because you dont put real pictures up of yourself and they aren't as personal. they usually have alot of games