In a podcast, Kulash states that one of his grandfathers invented the modern-day fish stick, and the other found a species of beetle.

[6][7] While in college at Brown, Kulash played in at least three bands: A La Playa, Calixto Chinchile, and Square.

He released three CDs in his senior year: an album of experimental Elvis covers (for his senior project), an eponymously titled five-song EP from his electronic pop band Square, and Appendices, a collection of more than a dozen miscellaneous recordings from his time in college, including solo songs, collaborations with friends, class projects, studio experiments, and recordings from previous bands.

[11] In August 2006, Kulash appeared on an episode of The Colbert Report to discuss the band putting their music videos on YouTube instead of going through the normal corporate video-making process.

In 2023, Kulash co-directed the comedy-drama film The Beanie Bubble, alongside his wife, screenwriter and director Kristin Gore.

[5] In early 2008, Kulash wrote a passage in Ben Karlin's book Things I've Learnt from Women Who've Dumped Me.

[14] Kulash had previously written two other op-eds in the New York Times: one in 2008 about Net Neutrality[15] and another in 2005 about the Sony BMG CD copy protection scandal.