Animal Jam
A virtual playground created by Nat Geo Kids that was intended for children ages 4-12. The site allows players to create their own animal avatar, wander around the vast world of Jamaa, trade, decorate their own den/house, attend parties, hang out with friends, and more. Being almost 10 years old, the site has developed over the years from its original beta period. Some people say that they liked the so-called "beta days" better, while others prefer the more modern Jamaa. Regardless there are over 10,000,000 players to this day.
Animal Jam is a virtual animal playground for kids!