Set Age Cheat for Sims and Neighbors! by TwistedMexi at Mod The Sims

Accidentally let a sim age up and you weren’t done with their younger years? Want a household full of just children? Play the “Home Alone” challenge? Maybe you want to set your neighbors age as well. Now you can do all of that!
This mod adds in the following cheat: tm.setage
You can use this by opening the cheat console using ctrl+shift+c