I have 2 things:
1. When my youngest son was 3 he was sitting on the porch looking very sad. So I sat down with him and asked what was wrong. He said "Well, I was thinking, mom's the oldest so she's gonna die first, then you'll die, then Maria and then Matt and I'll be all alone. So I'm sad." I never, in my wildest dreams, thought I would be discussing mortality with a 3 year old.
2. When the same son was in middle school, he was in the Indianapolis Children's Choir and was fortunate enough to get to tour with the choir. My wife and were chaperones. So not only have I been to a show at the Sydney Opera House, I've been to the artists spaces below and back stage; I've been in the crypts below Notre Dame Cathedral and the cathedral in Chartres France; I was also blessed to have lunch with the Sisters at Sacre Coeur Basilica, Montmartre in Paris.
Having kids is the most amazing adventure there is!