David Eisenhower — American Author born on March 31, 1948,

Dwight David Eisenhower II is an American author, public policy fellow, professor at the University of Pennsylvania, and eponym of the U.S. Presidential retreat, Camp David. He is the only grandson of the 34th President of the United States, Dwight D. Eisenhower, and the son-in-law of the 37th President of the United States Richard Nixon... (wikipedia)

Granddad offered me one hundred dollars if I would cut my mop of curly hair into a neat military style. Just before the wedding, I got a light trim. It wasn't enough for Granddad, and he didn't pay.
The future will use and dispose of the memories of people that we knew as history sees fit.
I think the power of a grandchild is it taps an instinct that people later in life also have towards... the world of nonprofits or charities. They want to leave a better place.