CES keynote presentation, Robbie Bach showed off Kodu, Microsoft's new game building ... game. Actually, to be more precise, it was shown off by Sparrow, an "actual 12 year old girl" who demonstrated her own gaming creation in which she and Bach raced each other to place rocks into a house. We don't really understand it either, but the point is she made the game herself and was even able to make quick changes to it right on stage. Don't take our word for it though, because you can watch it happen yourself. Check out a video of Sparrow's creation after the break.