I love this idea! You could even break them into smaller groups and have competing businesses to show the concept of capitalism. I think making it a longer process could be incorporating something about inventions...
Back to the original topic, I don't know much about business and technology in general, but maybe you could do your first lessons about Steve Jobs or some other iconic business leader and what made them different and successful. Break the students into groups for some kind of activities for those lessons.
Then, in the same groups, they should think of a product that they can easily make and sell. There are two ways to bring this into real-life scenarios for them:
1) have them make something and sell it at school. I think this would be challenging because the students' parents or you would have to foot the cost of the start-up.
2) have each group design something and think about how much it would cost to produce and that kind of thing. Then have the groups create an advertisement for it and set a price for the product. Have all the presentations set up in your classroom (or somewhere in the school) and have students vote on which products they would buy. The group that "sells" the most products or makes the most profit would get some kind of prize (lunch-time pizza party or something like that).
