Zach Galifianakis has cracked us up for years. From his role in the Hangover, to his web series 'Between Two Ferns,' to his many other ventures, he's always hilarious. He usually isn't the most kid-friendly though.

That's definitely was not the case when Zach stopped by Sesame Street, though. Zach and Murray work together to learn the meaning of the word 'nimble' in this clip. Definitely some fun for the parents and the kids in this one.