Is there a cheat that ages up sims?

Just be aware that if you age them in CAS, their new life stage might not start from day1, but how far into their current stage they are. At least that was how it worked when I aged most sims in CAS. One day an elder died on his first day of elderhood, because the game thought his stage was full already.

So, these days I only use the cake. One cake can be reused if you add new candles before anyone grabs a piece.