Although we cannot guarantee that all the sites will be what you are looking for, or what ages they will suit, here are some suggestions from various WikiAnswer users:
some virtual worlds are: Fantage.com, WoozWorld.com, Tootsville.com, and Chimpoo.com
The Matrix
Virtual worlds are NOT bad for kids! The people that interact with your child are probably bad. Some are good, some are bad, but virtual worlds are not bad! Virtual worlds are created by people that want your children, teenagers, and adults to have fun when they are bored, or at any time! Their are many virtual worlds, so don't worry about not finding the one that fits you! Good luck! :) - Sally
Onverse is a good choice!
The Sims 3 is a good website you can chat and meet new people, but the thing is that you have to download it. also buildabearville, you dont have to download it.many good websites are good
Webkinz.com coolmath.com o ya thats all i got!
well it depends what you want to search for, from virtual worlds to searching for school projects well some virtual worlds are Fantage, Animal Jam, and Movie star planet great websites where you can search are wikipeidia,this website, yahoo, and google HOPE THIS HELPED!!
There is Woozworld its awesome!
Xivio.com is great! Its a 3D no download free virtual world!!!
Bimbo,flyff
One good virtual world is gaia.com OH! AND TRY boombang.tv :D
LOL I'm a tween! Some websites I know are Fantage, Club penguin, moshi monsters, and not virtual but twitter!