Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
Habbo - Hobbo is also known as ‘Hobbo Hotel’.
Movie Star Planet - Movie Star Planet is an Online Virtual World, MMO, and RPG Simulation by MovieStarPlanet.
Poptropica - Poptropica, a virtual world for kids to travel, play games, compete in head-to-head competition, and communicate safely. Kids can also read books, comics, and see movie clips while they play.
MySims Kingdom - MySims Kingdom is based upon The Sims series but provides special and extremely different gameplay to the original series making it definitely worth your consideration.
Club Penguin - Welcome to Club Penguin, a virtual world for kids guided by an unwavering commitment to safety and creativity