K’NEX is still K’NEX — 70 models and a surprising amount of floor coverage

There’s a reason K’NEX has been around for decades \u2014 the rod-and-connector system lets you build things that snap-together bricks just can’t do. Wheels that spin, launchers that fire, structures that actually move. The 70-model guide in this set keeps a kid busy for weeks, assuming you don’t lose any of the tiny connector pieces in the carpet (you will). The biggest downside is the mess \u2014 these things scatter everywhere and become landmines for bare feet. But that’s true of every good building toy. A classic that earns its reputation.