Can anyone recommend books / videos/ games or other resources to help kids learn about starting a small business?

DD7 has been thinking up little businesses since age 4 and now she's getting more serious. This week it's a greeting card business called "Wish You Were Here" and she's been on the computer cranking out the cards. I think her enthusiasum is high enough to where the right idea could at least spawn a small booth at a farmer's market or craft fair.

A local community college had some business courses for kids this summer but she's not old enough to take them.

I could probably wing it but I'm not the business type. It would be far better to have a sort of authoritative guide book to help her learn the terminology and overcome the practical hurdles that she doesn't think about. I'm not at my most inspired rambling on about supply costs and target audiences.

Thanks!