-I guess I should say this as well, before people start asking "Where?!" and I say "In Vvardenfell, Morrowind" :facepalm:
They are evidently not in the in-game mechanics, but if you need proof, just go to Seyda Neen, and go into Arrile's Tradehouse. Go upstair, and there will be a note in front of the Redguard woman. It is on the counter. Scroll down where it says 3rd item...
It notes that there are children, about them not being able to buy or sell without a parental guardian with them.
And in the 4th item, it says Doe, but isn't it supposed to say "Does" ?? Seems like they made the typo at least twice, if you scroll down more... :shrug: