Maybe I misunderstand, but surely Kodu is a fantastic advert for your ideas, and you should be welcoming it? Here's a fun thing to do that is learning and on a platform with which your kids' friends will be familiar.
I can understand that the balance between Halo 3 app types and Kodu app types is the wrong way around from your perspective, but the XBox does make it fairly cheap and simple to understand how the games are written and provides you with the chance to show your kids how the magic tricks are done, so to speak. I'd have thought that was a good thing :-)
Kudos on educating your kids on what you think is important though; I think it's great when people really think through education and put a lot of effort into it.
I can understand that the balance between Halo 3 app types and Kodu app types is the wrong way around from your perspective, but the XBox does make it fairly cheap and simple to understand how the games are written and provides you with the chance to show your kids how the magic tricks are done, so to speak. I'd have thought that was a good thing :-)
Kudos on educating your kids on what you think is important though; I think it's great when people really think through education and put a lot of effort into it.