Long years ago now ....
We were playing 'I Spy' on the train when my son picked 'H'. After all the obvious (Hands, hair, head ....) we go on to more and more obscure 'H'-s and it was clear everyone else on the train was mentally joining in. So my wife and I kept trying and trying for about 10 minutes - nothing, but plenty of joy from our young son because he had stumped us. Eventually, we gave and it was announced - hiccup!
====== Most recently, which got my edition of Child volume 1, I opened it over breakfast and was enthusing about how important a book it was and so forth when my 16-year-old asked me: Can I have all your books when you die?