What is the best virtual world for kids

I Think That The Best Virtual Worlds For kids Is Fantage, Club Penguin, Dizzywood, And Free Realms. {Fantage Is Approved For Ages 8 And Up.}{ And Free Realms Is Approved Nine And Up.}

***UPDATE***
http://www.raspberrypets.webs.com
You get to be a pet it's really fun. I'm a bird right now, but I change my pet every time lol. Her name is Paraberry. I had a fox, and I had a monkey, but now I have a bird. There's even contests. I entered the Sock Monkey Pet contest. You can win a sock monkey avatar. You should play. Toontown is another good one.