Clubpenguin-I don't play it anymore but they usally have parties every month, if you become a member you can buy clothes, puffles (pets), items etc
Cartoondollemporium-it is more for girls and it is not virtual, soon you will have little worlds there right now you can buy items and DPM and PPM (members) get better items, you make friends
Webkinz-It is not bad, you look after a pet
Moshi Monsters- You adopt a monster, name it, feed it, dress it ect
Fantage- You have your own person-you can but some items if not a member, do fashion contests and the have a party every 1-2 weeks
Cartoondollemporium-it is more for girls and it is not virtual, soon you will have little worlds there right now you can buy items and DPM and PPM (members) get better items, you make friends
Webkinz-It is not bad, you look after a pet
Moshi Monsters- You adopt a monster, name it, feed it, dress it ect
Fantage- You have your own person-you can but some items if not a member, do fashion contests and the have a party every 1-2 weeks