If you don't want ANY sims to grow up, then theres a cheat. Heres the steps:
Steps
1) Press ctrl,shift,c
2) a box will appear
3)type in that box aging off
4) This will make ALL your sims stop aging.
Your welcome, Happy Simming!!
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Only the baby can grow up. Which is 3 days. The boy or girl Sim(child sim) can't grow up.
open the cheat box (Ctrl+Shift+C) and type boolprop testingcheatsenabled true exactly like that shift+click the sim and click set to birthday and they should grow up as an adult
It's similar to how you age sims. Have the boolprop TestingCheatsEnabled true cheat on. You have to have a sim selected, then simply shift click on a puppy and choose the "SET TO BIRTHDAY" option. Hope it works, did for me!
No, you only need to use the birthday cake to speed up the sims age
Babies growing up has nothing to do with ambitions. They just grow up like any other sim. If they're not aging at all then make sure you have Enable Aging on, but they should just grow up on their own.