As of April 2015, Animal Jam World provides updated gem codes for the Animal Jam game. From the homepage, click Codes on the drop-down menu. The website provides updates when new codes come out, usually every two weeks.
Gem codes provide access to free gems and other game items. Players get gems one of two ways: they earn them by playing games or they use the codes Animal Jam World provides. Codes enhance the game experience, so the website lists both current and expired codes. Gem codes work only once for each player. Animal Jam World invites players to use the contact form at the bottom of the Codes page to report expired or non-working gem codes.