Kids gotta be a full character before one can do that and it's hard to do so when your kids are just gonna be stuck as infants the whole game without some timey whimy shit as well.
I'm not expecting Kinu level stuff for every child. That would be unfeasible and too much of an ask.
In the first CoC when you interacted with Urta in her home there were a number of scenes that involved the kids, made the family the two of you were building feel less like a tally on a piece of paper.
Thats what I meant, something that made it feel less like I was taking inventory in the Nursery.