Do there ages change at all?

The same thing happened to me when I made a family. I keep telling people to pick up the
baby, but they don't do it. She doesn't grow up either. I don't know how to fix it.
sorry!

that's happenn 2 me 2 it's soooooooooo annoyin PLEASE HELP
ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

maybe if you used the forcetwin cheat code to get the twins, then a mutation happened. :P

maybe you nead to teach him to walk i don't the game but i think you have to do that or
you could have a scratch on your game i would go to game or game station and they can tell
you they could clean it aswell to get any scratches of but i thnk it costs money!!!

Since you're talking about twins, I'm not sure if this will work; Maybe you have to use it
on both kids to make it work. You can force them to grow another year, but only when you
WANT them to.

First, open the Console (Ctrl + Shft + C), then enter boolProp testingCheatsEnabled true ;
Shift+Left Click on the baby; Pick "Make Selectable" from the menu; Repeat the Shift+Left
Click & "Make Selectable" again; The baby is now selectable in Family List;
Shift+Left+Click on the baby in Family List; Select "Set Age," and then "Set to Birthday;"
The baby will now be able to grow up, but only through the Birthday cake option; If you
receive and error message (rarely happens), click the cake and select 'Reset'.

Like I said, I don't know if this will work when dealing with twins (this glitch never
happened with me), but it might be worth a try.