I'm playing the sims mobile and am lvl 17. I have 2 sims and both of them are ready to retire, and I have 3 children, 1 baby, 1 toddler and 1 adult. I wanna play as.
He is now old enough to grow up and change his age group to adult. I made the cake, put the candles etc, but all aging buttons ("blow the candles" etc) are greyed out with a notice that my sim cannot change his age group now. All other sims on the lot can grow up using the cake.
In The Sims, being an adult is permanent and children do not become adults without spells, mods, or third-party tools. While adult Sims can die if something kills.
There are third-party programs which can grow a child into an adult. There are also hacked objects which can allow a child to function as an adult, or vice versa.
Exactly what it says on the tin: A sim of mine just aged up to YA, and was Just select your sim then click on a mirror and choose “change sim”.