Birthday cake

The Birthday Inferno Birthday Cake is an object in The Sims 3 and can be bought at the supermarket. It can also be be found in the Entertainment > Parties category in Buy mode, if Buy mode is set to "Sort by Function". It is used to age up a Sim by one age category. It can be used on any Sim on the lot, not just Sims in the household. Occasionally, it may catch fire.