I took my gimpy old camera to school the other day so I could get some video of the old folks who play traditional music there every morning (when it's not raining). There are lots of seniors in the park at that time of day, dancing, walking, doing martial arts, and chasing the grandkids and great grandkids around.
New mothers go back to work pretty quickly after a baby is born, so the grandparents take over child care duties. I see more infants with their grandmas than with their moms on weekdays.