[1] The toy's building system consists of interlocking plastic rods, connectors, blocks, gears, wheels, and other components, which can be assembled to form a wide variety of models, machines, and architectural structures.

[citation needed] By 2011, K'Nex was distributed in over 25 countries, including the United States.

[citation needed] In 2018, all of K'Nex's assets were purchased by Basic Fun!, a Florida-based toy company.

[10] The basic K'Nex pieces used to make models include rods, connectors, and bricks.

[13] The U.S. Space and Rocket Center held a Guinness Book of World Records Award for the "World's Largest K'Nex Sculpture" and also has a huge space shuttle and rocket in their gift shop in Huntsville, Alabama.