I've taught all 4 of my kids how to properly change a battery, they laugh about 'my' reminder method even to this day.
I told them the sequence is NPPN.
Remove Neg then Pos, Install Pos then Neg.
I said if you ever forget, just remember that you pee between your legs, hence NPPN.
I caught my youngest daughter(22) coming out of my tool/supply room carrying a bat. post cleaner and a jug of never-seize.
She walked by and before I could say a word, she said 'I know dad, I pee between my legs' and she kept cruising by.
She can also change oil and brake pads.
She will make some lucky guy a good mechanic one day....lol.