Awesome! Welcome to Club Wii
Mario cart is fun. My kids like all the Lego games but the latest one - Harry Potter years 1-4 is their favorite at the moment and I must admit I like it too. You can help him out with the harder puzzles and he can run around hitting things and picking stuff up
I have brought second hand games from eb games. They are checked to make sure they work properly and they come with a 30 day guarentee..encounter a problem and they will replace it. I'm not sure if Game has the same policy but I would say it would be something similar.