WarpMyMind

It seems that most AR files are centered towards people being babies. I'd kill to see one about becoming a little kid instead. It seems near impossible to find anything on it.

That's my thing too. I use the file "magic panties", but that's supposed to help the user 'grow up' from being a baby girl. In combination with "Little Girls..." it works really well for me, age anywhere from 2 to 8 (or up to about 13 if someone triggers me to be a particular age)