I recently had the privilege of giving my 74-year-old grandfather his first ever telescope view of Saturn. His reaction is something I will never, ever forget.
This man has been alive through some of the biggest scientific and technological advances, and clearly remembers Sputnik, the moon landing, and the Voyager launches ("The bloody hippies were s***ing themselves when those voyagers took off, but they always reckoned someone was about to destroy the world, so nobody took much notice of them"

), but had never actually looked through a telescope. Thankfully his eyesight is still good enough to enjoy the sights, also showed him the moon, 47 Tuc and a few brighter open clusters, each one left him speechless...
Absolutely amazing sharing something like that with someone for the first time...
Davin