What are some virtual worlds for kids that are fun

Theyres Club penguin, Meez, Stardoll, Wee World, Wizard 101, and Runescape those are the ones i usually go on!.!

And there's more:
Ourworld
Whyville
Webkinz
Secret Builders
Super Secret
Toon Town
Roblox
Small worlds
Tootsville
Babydow
Neopets (a game where you can take care of pets)
Second life (is for ages 13 and over)
I have heard of = Fusion Fall (check it out to see if it is good)
Fashion Fantasy Game
Barbie Dolls
Moshi Monsters
Planet Cazmo
Club Penguin
VirtualFamilyKingdom
Hope it helps!! I will soon put more on!