Kids are not excluded from the Massively Multiplayer Online phenomenon. There are plenty of games available for children.
Farmerama is a Free to Play browser-based game MMO, where kids can live as a humble farmer, making the best of life and tending your greatest asset: your land. There's a farmhouse, barn, mill, water tower and manure pile on this field for you to use. Voted best European Browser game.
Free Realms puts our junior gamers in a jaw-dropping free virtual world where they can do whatever they want, whenever they want! There are many roles to choose and friends to be made online. The game also offers a host of really cool mini games. Backed by Sony Online Entertainment.
Just always remember to check the online age ratings before your let your children play the game.