There is smallworlds.com. It is most definitely the best for teens.
yes
Smeet is a Very good virtual world. I love it
Not unless you create one yourself
'Control Monger' is a good robot shooting game.You may be interested in a dinosaur virtual world!!!It is 'Webasaurs'.
Yes, there are. Such websites as SimCountry, Cyber Nation and NationStates are good virtual world websites.
Try virtual families or virtual villagers
Any Virtual Worlds For Teenagers Were You Can Be A Fairy
Nearly all games that include a virtual world are advised for players from 13 year and over.
IMVU
Imvu isn't a virtual world but you can swear in chat rooms.
Weeworld.co.uk
fairyland