As children growing up in Topeka, Kansas, my brother and I cut out entrepreneurial teeth on our used golf ball business.

Our little house backed up to the Shawnee Country Club, and a lot of the golfers were pretty bad shots, so their balls wound up in out big back yard. This gave us a pretty huge (not to mention free) product inventory. But there were some ground rules set by the local regulatory authority – my father, himself a bit of a golfer!
- The players could come into our yard to look for their balls.
- We could not impede their search (sit or stand on the ball in question) or take the ball before the owner abandoned it.
Then, once abandoned, we put the ball into one of three buckets. Bucket One was for balls that were pretty pristine. Bucket Two was for balls that were in pretty good shape, but maybe a bit scuffed. Then Bucket Three was for funky balls best used around the lake. We sold them at three for a dollar, and the golfer got one ball from each bucket.
We had a lot of regular customers, and they quickly learned they could not get three balls from Bucket One for a buck - the could not take advantage of these smart kids. Jack and I split the proceeds fifty-fifty, and we earned a lot more than we could have gotten as an allowance – certainly enough to keep us in movie money. It was during this period that I first developed the sales and negotiating skills that have worked for me in real estate.
Then one day, my brother crossed the line. From the big picture window overlooking the back yard, my dad saw him snatch a golf ball as it hit the grass, then run with it into the garage. Brother got his license suspended for two weeks, and my dad made him give the ball (it was certainly a Bucket One quality golf ball) back to the guy who hit it into the yard. Oh, and he had to apologize, which was actually good for business.
When I heard about this, I was, of course, quite gleeful about, first, my pesky little brother getting into trouble, and second, that I had the golf ball business (and the profits) to myself for an entire two weeks.
And, at the same time, we both learned an important lesson about ethical short cuts, and somehow we both got the message that they were a bad idea to include in one’s life strategy. I think the Kennedy children benefited from awfully good parenting, though I did not always appreciate it while I was growing up!
As kids we don't realize the wisdom and guidance our parents try to give to us. Now, as a grown up, I understand a lot of what I didn't "get" before. It's great you were able to become business-minded at such a young age. Robert Kiyosaki would be proud...