The giant cake at the party is usually brown, but 2013's version of the party used a purple cake instead.

Jammers can also get a holdable cake slice to carry by clicking on the flame of the number candle at the top. There are several striped candles on the cake that give Jammers a holdable ice cream cone to carry around when they click on the flame. This party has three shops where Jammers can buy items that are mostly related to the Alphas: a clothing shop on the left side of the second layer, a music shop on the left side of the first layer, and a den item shop on the right of the first layer. The music begins to play the Birthday Song melody in a slow and heavy tempo, which then transitions into a faster and lighter tempo. This party plays the Birthday Bash song in the background.

Along the bottom layer is a series of bronze statues representing the Alphas of Jamaa, many of whom have yet to be formally introduced. Along the top of the cake, there is an area where jammers can sink into the cake. On the top layer, rests a number candle, representing how old Animal Jam is. Several scoops of ice cream can be seen around it, along with a few cookies and what appears to be a chocolate river.

The AJ Birthday Party seems to entirely take place on a triple-layered cake.

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