One of my earliest ventures was when I was nine years old. I realized there was a shortage of pencils at school, so I started Rent-a-Pencil. But I made a fundamental mistake. Everybody stole my pencils.
Engineering stimulates the mind. Kids get bored easily. They have got to get out and get their hands dirty: make things, dismantle things, fix things. When the schools can offer that, you'll have an engineer for life.