Walmart offers the K'Nex 4-Wheel Drive Truck Building Set, model no. 11414, for $11.99. (Amazon charges the same with free shipping for Prime members, although it's out of stock until July 1.) Choose in-store pickup to avoid the $4.97 shipping fee. That's the lowest price we could find by $17, although we saw it for a buck less last week. It comes with 313 pieces, including working lights and 4-wheel steering functions.