Grandma told me Mama was once caught by the Principal for writing in the front of her book, "In Case of Fire, Throw This in First." I have never had so much respect for Mama as the day I heard this.
Grandmas can shed the yoke of responsibility, relax and enjoy their grandchildren in a way that was not possible when they were raising their own children. And they can glow in the realisation that here is their seed of life that will harvest generations to come.