Expand how children learn through play.

Right now, as far as I can see, children learn through their traditional hauling, building, demolishing, etc. jobs.
Maybe with the new teaching/student skills and mechanics, they also take classes, but I haven't seen anyone give a lecture in advanced mining yet.
Only the bugged combat lectures and those are only for squadmembers afaik.

I'd like to suggest children playing with pets and each other, getting lightly cut and bruised in the process. (barring serious accidents)
For wrestling and social skills.
Most conversation skills are probably already learned by hanging around in meeting areas.

Hanging around workshops (or favoured dwarves) could imprint a basic level of a profession.
But then many people probably like the clean slate nature of new adults.

It would be interesting if the consolation dwarf was also a nanny, comforting hurt urchins and bringing them to Doc. (as parents often don't take much heed of their ambulant offspring.)