You want a free virtual world where your kids can chat without a email address?

Here it is

virtualfamilykingdom.com

meepe

Club Penguin

virtual villagers

yoowalk

dragon fable

barbie

fantage

whyville

supersecret

Here are some safer ones

Clubpenguin

Webkinz (plush toy needed) (or you can play for free but thats only for around a month)

Jumpstart i would also try switchin its one of the best games ever

Thanks for asking this question because I love answersing questions so here u go