....include the following;
A "fart whistle" in no way resembles a fart. Upon explaining this to the woman who'd sold it, we were told that "all farts are different. For instance," she said, "I'm a vegetarian..." (too much information).
If enough burrs are thrown at you, they make the skin itch for some time afterwards.
Children fight. All the time (I already knew this, but it was a tiresome reminder).
Boys eat. And eat. And....you get the picture.
Boys are endlessly funny/entertaining (fortunately. I knew this, too, having three sons of my own, but it's a nice reminder).
Children ask ridiculous questions just in order to keep you talking (eg "what's your favourite letter of the alphabet?").
That there's a wonderful word for that desperate patting of pockets etc. to find things such as keys. It's called "grubbling".
That when they come to stay, they want to do exactly the same things, every time, even including having me read the books I read to them when they were toddlers.