I decided to make a corned beef hash for tea.
DS1 is 11 and wanted to help. I handed him potatoes and the peeler.
He managed to cut himself on the peeler and tried to push it away from him instead of pulling towards him when peeling them.
My ex was a SAHD for the last few years, and since he's left I'm discovering more and more stuff that just makes me shake my head in disbelief that they can't or won't do.
More so since we've been in self isolation!
Honestly.
(Just to stop anyone piling on I did show him how to use it properly, and didn't say anything bad out loud)
There's also the whole bringing the dirty washing down in his arms and dropping it on his way instead of just using the basket, DD not realising that she's actually allowed inside her reading den and it isn't just there to look pretty, and DS2 not knowing he doesn't have to take his pants completely off to go to the toilet, or that you're meant to close the toilet door. How he manages at school I don't know 

(he's 4, he's got plenty of time to learn)
And of course before the everyone moans, it's light-hearted.
So what things are you learning about your children? Do they do anything completely differently to how you'd expect, or are they just not aware of something you thought was pretty obvious?