The word stays "young children" irrespective of their age. You can elaborate on that with "grown-up youngsters" or, additional awkwardly, "adult small children" but if you are detailing that somebody's kids are a lawyer and a politician then their adulthood is implied. I think, maybe, the OP was inquiring more details on the "Mammoni" form. As I

And another person might utilize it to emphasise that their children have left dwelling or usually are not depending on them. But You would not introduce another person as "my adult boy or girl/ren". Stuart File Obtaining exact meaning for young kids"offspring" "Children"seems to be correct making use of in context but I would really like be a p