- HOTNESS UNHOT
Amazon with My Things Your Treasures has the K'nex Nintendo Bowser's Castle: Mario vs The Thwomps Building Set for $12 + $6 shipping = $18 shipped. Create your own track with one battery powered kart and bonus banana peel. Includes 139 pieces and is compatible with other K'NEX Mario Kart Wii sets. $26 and up everywhere else.