Because they would have remembered that he sent a congratulatory note to "the Ardern lady" after she had a bubba.
And collar some kids today and ask them who is the Prime Minister of Australia and they will likely still reply "the Mr Turnbull man".
For many children will have embraced the fact that when someone is voted to by the Prime Minister they stay in the job for three years.
But what they don't grasp is the fact that in Australia you only stay in the job for as long as the ones who suggested you do the gig want you to stay there.
It has come to pass children (I have put on my teacher's hat at this point) that the term of Prime Ministership is whatever you want it to be.
One month ... two months ... one year ... two years ...?
This uncertainty has been pretty well passed into normality and formality, and law for that matter given it is always given the legal tick of reality, with the average term of an Aussie PM over the past eight years working out to around 1.3 years ... although some have done better than others of course.
And blokes like Kevin Rudd had two cracks at it.
His first stint after taking the reins from John Howard being two years and seven months ... so he nearly made it.
But Julia Gillard was put in the role and crikey, she got three years out of it before old Ruddy got back in the door.
But only for five months after Tony Abbott rolled him and Abbott managed two years in the position and then Malcolm Turnbull got the nod.
And he just about got three years under his belt but in the last fortnight got the shove after his colleagues installed Scott Morrison into the PM's office.
Scott Morrison?
Who's he?
I'll tell you who he is.
He's the bloke who'll probably collect about three months worth of PM pay packets before he too gets shown the door, because there appears to be an awful lot of whispering and pointing and sneering expressions rippling through whatever party he happens to represent, because I've forgotten.
I actually thought Scott Morrison was a cricketer.
A chap I know said the almost annual turnover was a fine part of the home safety factor.
"Every time there's a new Aussie PM I know it's about time to change the battery in the smoke alarm."
Six Prime Ministers in eight years.
It's all rather intriguing and remarkable, and puts this land of ours into a reasonably positive spotlight.
We appear to have, and excepting the Shipley coup which deposed Jim Bolger 21 years ago, embraced stability in terms of leadership.
And while some of the leaders in the intervening years have drawn some grimaces and snipes there has always been a sort of "she'll be right" attitude among the populace.
We simply say "let's see what happens at the next election yeah?"
And that is that.
They must be watching too many Italian films over the other side of the Tasman because Italy is also adept at showing one leader the door and inviting in another ... who half the populace haven't even heard of.
Politics huh?
Across the great landscape of Oz it is as colourful, mysterious and unpredictable as the next episode of Neighbours.
And hey, the Aussies love a big race and are wont to put a few bob on what they see as the favourite, so I suspect there are already sweepstakes up and running into how long Mower Morrison will cut it as PM before getting voted out to be replaced by whoever else is completely unknown outside tight political circles.
Wonder what old Ruddy's up to these days.
Third time lucky?
"So then children," I must ask in my scholarly tone.
"Who is the current Australian Prime Minister?"
The young lad with the muddied knees suspects it may be a chap called Michael Cheika.
"No it is not Michael Cheika," I inform him, but give him half a point because in the arena of Aussie sport the "on borrowed time" component also exists.
