5 Things to Know About K'NEX Building Sets

Rod-and-connector system enables moving parts K’NEX lets you build wheels that spin, launchers that fire, and structures that actually move, unlike snap-together bricks.

70-model guide provides weeks of building The included guide keeps a child busy for weeks, assuming you do not lose the tiny connector pieces.

Small pieces scatter and become foot hazards The biggest downside is the mess — these pieces scatter everywhere and become painful landmines for bare feet.

Piece loss is nearly guaranteed You will lose some of the tiny connector pieces in the carpet, but that is true of every good building toy.

Classic toy that earns its reputation K’NEX has been around for decades because its system enables builds that other toys cannot.