K'Nex Building Set Toy 141 pc CAR SHADES Prevents trailer ball from being

Prevents trailer ball from being inserted into the coupler

High heat resistant when dry

Easy-to-clean anti-clog nozzles

strong muscles

4400 and 2400/2140 models require the OEM upgrade kit #1413

K'Nex Building Set Toy 141 pc CAR SHADES Prevents trailer ball from beingBuilding 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