November 3, 2015 by: This post may contain affiliate linksAmazon: 50% Off K’NEX Building Toys = 375 Piece Deluxe Building Set Only $9.99 + More! Looking to get a head start on your Christmas shopping? You’re in luck! Today, Nov. 3 only, Amazon is offering up 50% off Select K’NEX Building Toys with prices starting at just $7.50! Some nice deals we spotted… K’NEX 375 Piece Deluxe Building Set on sale for $9.99 (reg. $19.99!). Lincoln Logs Horseshoe Hill Station Toy only $15 (reg. $29.99!). K’NEX Mighty Makers Up, Up and Away Building Set only $9.99 (reg. $19.99!).