Discussion between my 6y.o., 8y.o. and myself:
6y.o.: We've not have our pocket money this week.
Me: That's because it's Tuesday - I give you pocket money on Wednesdays.
6y.o.: But you only need to give us another $2 coin and a $1 coin.
8y.o.: Why did she say that you need to give us $3, pocket money is $5.
Me: I've just given you $2 each (they had just unwrapped their chrissy presents which included a piggy bank each).
8y.o.: She's too smart for her age.
Me: Yep! I dread when she gets to high school, I won't be able to help her with her homework. You'll have to.