Club Penguin, Stardoll , Ourworld or Pandana , hope this helps :)
sims is a game that you can have a virtual house that you can decorate and have a virtual avatar .
There is moviestarplanet you make avatar have your own house make friends .
webkinz
there is one called www.vizwoz.com/ where you can make a avatar and make a house and talk to people xhope its what your lookig forx
second life
Habbo...Habbok.....Those are the main ones you can like have a boyfriend and create a house and buy things for your house......And you can create more things its really fun
the advantages of CADD are that you can create virtual floor plans and house plans almost perfectly.
Fantage.com is a good website. You earn starz (money) from playing games. You can use your starz to buy clothes, boards, hair, skin color, shoes, eyes, and furniture. Its a reallyfun virtual website you can chat as an avatar and decorate your own house. Its really a cool website. Check It Out http://fantage.com Ivy <3
Here are some. I listed them in age groups. Small Kids Tootsville Webkinz Totstown Pauly's playhouse Older Kids/ preteens Fantage VirtualFamilyKingdom Fashion Fantasy Game ToonTown Barbie girls Xivio Panfu Marapets Teens Onverse! Vizwoz IMVU (also can be for preteens) Gaia kings of chaous And more!
weeworld.com is really fun, you make your own house and avatar. gaiaonline.com is also good, but sometimes doesn't work. poptropica is one of my favorites, you complete lots of cool islands and get medals woozworld is another website like this, you can buy clothes and furniture and roam around the world and create your own unitz club penguin is also the same, except you are a penguin.
To get another house in smallworlds you have to either buy one or make another avatar because you get a free house for each avatar, but you can only have up to 5 avatars.
You basically just start from the beggining and they have a job automatically when they enter the house. For the question; Can the children get married its the same answer. I really hoped this helped!