[zzygan]

Very interesting idea. I need to figure out a way to teach my kids about money and cashflow using something like this method. However, as cool as this story is, I swear I read it in one of Rich Dad Poor Dad books. Maybe this is the source of the books story. I'm not sure.

[robfitz]

From my perspective, it doesn't make a huge difference whether the idea was independently discovered by my dad or inspired by something he read--what matters is the effect it had on me.