Hello everyone, i am new here, well I've bought this game 2 years ago but i just get the expansion pack 3 months ago. Well i was reach the bored state when i am playing without expansion pack. But i wanna share how to un-old, i have a main character that family person man, i made it natasha in town, and he reach a lot of skills etc, and i just don't wanna him to grow old and die, in my household are just three person, that man with his daughter and son, well now his daughter are young adult, his son are teen, but he still adult... well i hope this doesn't a repost, i use the edit cas cheat, so i edit again my sims with CSC, well when his birthday to elder near i just edit him with CSC in cas mode, select him to young adult and switch to adult again (i didn't click OK button that exit cas yet)... and my sims are start in adult again. Well if you switch from young adult to teen you will lose some trait and your purchased lifetime happiness might also vanished, but mine still, and that is how i made my sims unaging, well now he has a grandson at her age (adult).