We pay the children a symbolic pocket money of about 1 dollar per week. They are still very small so they don't care about the numbers in the LN wallet and prefer physical coins. However, I am thinking of trying to issue them bitcoin IOUs. I'll just write on a piece of paper how many sats I owe them. They'll be able to collect it in fiat at any time, but I'll change the default.
We don't want to pay them completely for chores, but if it's some work directly for us, we will.