Heh, Good for him. Good for his parents.
My Mom taught me how to make change, ‘count it back’ properly, when I was about 8 years old and embarking on my first business venture... A Kool-aid / Lemonade stand.
As it turned out, it was a wasted effort; My only customer for two days was my Dad, and he let me keep the change.....
Which almost covered the amount I had to pay Mom back for the ingredients that she ‘fronted’ to me.
Hey Dad was a great customer! The best!
Wife Swap had a family on where Dad gave the kids an allowance, then took out 20% for the Lord (double what the Lord requires), income tax, and enforced savings. Needless to say, the kids ended up with very little. And Dad was proud of himself.