Get one of three K'NEX Mario Kart wii Building Sets, originally $24.99, now to $5.99 each at ThinkGeek.com. Even with shipping that starts at $6, that's the lowest price we could find by $13 each ($24.97 on Amazon). Choose from Yoshi, Mario, or Luigi with standard cart and pieces to recreate your favorite Mario Kart track. Better yet, get all three and make a variety of different race tracks with multiple cars. Look in the clearance section for this and other discounts. Receive free shipping on $75 orders. There is no sales tax (except OH and VA).