Birthday cake

The Sims 2
London's Famous Birthday Cake is an object in The Sims 2. It can be bought in Buy mode, where it is found in the Misc > Party section. It is used to age Sims (except young adults and elders) to the next life stage, but can only be used if the Sim is within 24 game hours of transitioning. Babies and toddlers can be aged up if a teen, adult, or elder carries them to the cake..

The Sims 3
The Birthday Inferno Birthday Cake is an object in The Sims 3 and can be bought at the supermarket. It can also 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.