Happy Day after your birthday.
Old is a subjective thing. Some days I feel ancient, some days I feel young.
In subjective terms, When you said something about your kiddo, My first thought was he is not old enough to have a kiddo.
I always liked my Grandfather's way of dealing with it. He was always going on 100. He would always say he planned on it taking him a while to get there, but that was his plan.