Kian and I finished Up today on the 360. We had a lot of fun with it...it was a good co-op adventure that was very similar to the Lego games that we enjoyed a lot. Kian continues to amaze me at how well he's learning new game mechanics. Now that we're getting low on truly co-op games to play, I think we're going to start down the list of games we have that are ok for him(Banjo Kazooie, etc) and just pass the controller back and forth as we play through the campaign.