Animal Jam takes place in the world of Jamaa, where players can travel through various ecological environments. Each environment features different interactive facts, games, and virtual shops. Players are represented in the game with customizable animal avatars. Players can accessorize their avatars, decorate their dens, and adopt virtual pets. Players interact with one another through chatting, trading/gifting, or by participating in multiplayer games and parties. Players are rewarded with achievements for collecting facts in game, making friends, and decorating their dens. Players also earn the in-game currency, Gems, by completing games. Gems enable players to make in-game purchases of additional avatars, accessories, dens, and den items.
Source: Wikipedia, "National Geographic Animal Jam", available under the CC-BY-SA License.