My grandmothers were age 54 and 65 when I was born. As far as I know, neither one ever drove a car, took a trip that didn’t involve visiting family, or chose to exert herself to stay fit. She didn’t need to, work took care of that.
My grandfathers drove, but I never really knew them. One died before I was born and the other was someone I heard more about than ever got to know first hand.
Whether I knew them or not, I am confident my grandparents never traveled to another country, learned a second language, kayaked, swam for the fun of it, ran in a charity race, took dance lessons, wrote a book, or even took photos of their grandchildren. I don't think I ever saw my grandmother taking a photograph. She probably didn't own a camera. Her life revolved around work (until age 78!), family, church and doctoring, until she was so debilitated she ended up in a nursing home.
If you’re old enough to have grandchildren, what do you do that you’re sure your grandmother or grandfather never had a chance to do?