No, they aren't "STUCK" at 6 forever, it is just that when I left, they were different ages, when I come back, they are ALL the SAME age - SIX. THEY ARE ALL SIX. I have 2-3-4 year olds when I leave, I have SIX YEAR OLDS when I come back.

It is ANNOYING. Then they age and have kids and when I come back ALL THOSE KIDS are SIX SIX SIX. ANNOYING. Eventually, I have a whole tribe where 1/4th of the people are all, say, 58, 1/4 of the people are all, say, 37, 1/4th of the people are all, say, 19, and 1/4th of the people are all SIX SIX SIX SIX SIX SIX SIX.

AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!