Originally Posted by La literatura
One of the great things about money is that not only can it get you stuff, but it can also make more money. A dollar today can be put into work and end up being two dollars tomorrow. I would try to replicate that lesson on a small scale.
Suppose that for every dollar he earns on yard work, see if he would save a simple dime from it. Make it mandatory at first. Then say you will invest that dime, with a 50% return on investment per week. After a week, he would have $.15. Then after another week, and another dime, he would have $.38.
Do this for 6 weeks. He might appreciate the notable difference between $.60 and his "investments" and take that lesson to heart.
I've never met anybody who is a parent and has time or energy for this kind of system.