It is for elementary age kids, takes some time, and you do have to create an account with a username and password, so with multiple kids you will want to create multiple accounts or have them play as a group. Things go more smoothly if you create the accounts before you sit down with the kids to play, but it can be nice to do it with them if you want to help them gain some internet savvy (but, then again, maybe you don't want that!).
http://www.portcities.org.uk/london/server.php?show=ConPackage.20
