Should People Listen to Kids' Ideas?

The other day I was thinking of cool ideas for video games and other electronics. I really had some great ideas, that would at least interest me as a kid. For instance, I thought of a "virtual world" that could be accessed through a PDA, and in that world you could set up your own shop and sell products, similar to Ebay's stores. But then big corporations could start taking advantage of it and let you buy anything you want anywhere in the world. I know you can already can buy things you want online, but this would be more of a user friendly system. Anyway, I just felt that maybe the people that are actually doing the "doing" should have more of a say.