When it comes to bitcoin wallets is totally a kind of private pants for females and boxers for male. Bitcoin wallets is like ATM pin which is assigned to individuals which banks do not respect another person on your behave.
Lol love the word play in this and how you describe how Bitcoins privacy is to be respected 
Can we also show our bitcoin key to someone closer, maybe love, spouse, next of kin?
The fact that crypto can not be accessed by forced entry except in a few rare cases were a wallet can be brute forced and because of this it's only fair and unselfish that we pass this crypto onto the next ones without leaving these coins to be forever forgotten when family can make use of the crypto money.Better still between someone; who introduced and taught you about bitcoin, a friend or family member and your children who's most preferred and reliable person to give out our information about your bitcoin?
Let the kids have this as a present, with crypto being the future they are pretty much going to figure this out, better yet a mnemonic can be left with words being mambo jumbled with life events that they only can know answes too.