Foo pets club penguin pixie hollow ( my personal favorite ) dizzywood barbie girls ty girls beanie baby webkinz moshi monster build-a-bear toontown second life wizards 101 jump start chobots ourworld coolmath good luck with them there are a lot more to
There is Club Penguin, Dizzywood, Woogi World, Planet Cazmo, Runescape, Barbie Girls, Moshi Monsters, Pixie Hollow and OurWorld all of these I have accounts on. Some I find better then others my favourites are Club Penguin, Barbie Girls, Pixie Hollow and Ourworld. There are other virtual worlds as well that I do not know of.