I can't say my parents had lessons this cool, but I did spend some of my time in my teenage years working at my cousins' vending machine warehouse, doing variou

I can't say my parents had lessons this cool, but I did spend some of my time in my teenage years working at my cousins' vending machine warehouse, doing various tasks: counting the take (and filling out the spreadsheet), filing refill slips for the drivers, putting new inventory in the right place, trips to purchase new inventory, and even refilling a machine once. It's a pretty interesting business, and it's interesting to me to see how one can scale up the "levels of responsibility".