This set is my favorite of the 2012 series so far. I love the colors, traps, and the detail put into this set. The set includes Bowser and Mario with their Standard Karts, 2 items, a penguin launcher, a penguin, a shy guy, and several pieces of track.
Bottom line I would say this is a safe buy for any Mario Kart fan! The K'nex Mario series is a great series and so far with the 2012 sets this is my favorite out of the 2012 sets so far, but I have a feeling the Ultimate Combination Building Set will probably end up being my favorite set of the new 2012 series.