"GalacticGal;c-17797196" wrote:
I always use a cake per Sim. I never try to age two Sims up using just one. Fact is, they won't simultaneously age up anyway, the game mechanics aren't set up for that.
I have aged up at least 10 sims on one cake. You just have them blow it out and put candles back on it. Then I put it in the frighted until needed. And I watch my sims like a hawk to make sure when they get leftovers its not the cake. I was playing the 100 baby and it made it easier. If its twins I age up the first born etc.