Q: Do you know of a NL cassette tape in the late ’70s/early ’80s of sound effect tricks to play in the car for unsuspecting passengers? It seems to have included farts and explosions, a fake news story about an invasion. It came in what looked like a suitcase w/handle, dark brown with road signs or city name stickers (something to do with traveling).
A: It was “The Official National Lampoon Car Stereo Test and Demonstration Kit” which came out in 1980 in cassette format. An ad for it appears on the July 1980 issue. More info in the Comments link. (Thanks to Duane, Michael, and Dave for helping to answer this question.)