Interesting. I was an elementary school teacher in Canada for a while. I couldn't stand it because I knew I was teaching them to be good employees and good consumers, not much more.
I think more than teaching your kids a love of business itself, the most important thing is to prevent them from being one of the sheeple. I mean, don't let them undergo the same kind of blind social conditioning that most people go through (to make them passive consumers). If you don't believe the hype, I don't see how you could work a 9-5.
I'm not sure exactly how to break that. But I would guess really limiting the amount of tv they watch in their early years is important. Some parents only let their kids watch the Disney show. Disney is the worst thing you can let your kid watch if you're worried about social conditioning.
Read with them of course, quality literature. You can choose literature that reflects values you want them to learn, and when talking about it you can play up certain values and amplify them. "This cat is smarter than other cats because he doesn't wait for his owners to feed him. He knows he can catch 100 mice a day if he puts in the effort". etc. Kind of a lame example but I'm brainstorming. That value might not even be part of the book, but you can assert that value onto the book and your kid will believe you. If the US school system is like Canada's, then teachers are prescribed specific values they're supposed to teach kids through literature. Those are pretty much what you would expect. But there are teachers who assert their own values onto the literature to indoctrinate students, teachers with a leftwing agenda or a religious agenda or whatever it is. You might need to override some contradictory values they've learned at school.
I would also say travel with your kids. This expands their horizons and teaches lessons about problem solving, flexibility and constant action that can't be taught at home. Going to Mexico is probably a good idea, or other countries. They can see what a less zombified culture looks like. This alone will set them apart from most Americans, and they'll probably grow up understanding that most people around them go through life in a daze, unaware of what hasn't been taught to them. A lot of other countries too have the whole street vendor culture, so they can see business owners out there hustling. Maybe you can see that in big city America, so some trips to the city would probably be good. Otherwise they think that business owners are some God-like individuals living in another dimension, somebody they can't become. Seeing a real individual hustling brings it into their world and shows them anyone can do it.
As far as directly teaching them about your business, you should instill a curiosity in your kids about the work you're doing. When you're busy working and they come look at the screen, don't tell them to leave you alone because you're busy, tell them what you're doing and show them what you've created. Give them some little tasks to help out with, have them enter some numbers for you or cut and paste something so they can feel like a part of what you do. Kids love taking on that kind of responsibility even if it's something token.
Those are some of my ideas. If any of it doesn't gel with your worldview that's cool. But I hope that helps in some way, or gives you some ideas.