SimsPE

[Cassie]

I can't really tell you how to do the second one, you'd have to ask someone with experience in that field for that. As for the switching adult's into baby's body, I think I can help you with that, but I haven't been on SimPE in months and I don't have it on this computer so I can't refresh my memory, so I'll probably give yo wrong instructions, but I'll try.

You need to go to the top left corner and click all of them (because I can't remember which one you click) where it says 'File' and so on.
When you find the drop-down menu that says 'Neighborhood browser', click that. Choose a neighbourhood. Then click taht same drop-down menu, and click 'Sim browser'. Pick a playable baby Sim.
Now, I don't remember well what you do next, but when the baby's profile loads up, you're free to edit it as you wish, and something about changing their age group is in there somewhere. And mae sure you save what you've done when you've finished fiddling or it won't effect the game.