K'Nex Beginner 40 Model Building Set - 141 Parts - Ages 5 & Up - Creative Building Toy, Multi, 141 K'Nex Parts And Pieces,IncludBuilding with K'NEX is easier than ever, with the beginner 40 Model building set! Featuring all new easy build parts that allow children ages 5 and up to have a frustration free building experience. The new parts a barbell shaped rod that easily sandwiches between 2 connectors, and a flat panel piece that provides structural support were specifically designed to address the needs of younger builders, who can easily build 2 flat shapes and then connect