Investing in business is the greatest return on investments (talking solely financial gains). It is why venture capitalists exist. They put money into things that have a high chance of going bust, for that one time when they will see 1000% gains.

With business, it is actually all about finding a customer. I could make the most beautiful cabinets, but without a customer that wants it, its a waste of wood and time.
So, a business is find a need and fill it.

Free range turkeys are a growing industry. As people are becoming more health conscious, they want healthy meats. And getting your turkeys from a local farmer is great. BUT, turkeys only lay once a year, so you get your turkey chicks once a year, and they grow up in time for Turkey Day.
Just be sure to find buyers before starting. Have half of your turkeys sold before growing them. Its actually easy if you have a friends in the community.

So, teaching your children about being entrepreneurs is the most awesome.