My son's birthday is Monday. He's turning 6. Against my better judgement, I got him a Nintendo DS. There were some good reasons for doing so that I won't go into (or at least I keep telling myself that). Anyway, I don't know much about the DS, and I want to get him a cool game for it. I am going out today or tomorrow to get one. What are some of the cooler games that a 6yo would enjoy? I already have the remake of regular Mario Bros. What else? Thanks.