Nirvana, purveyors of grunge rock and Happy Meals. | PHOTOS: Nevermind turns 20 (Michael Lavine)

Nirvana’s “Nevermind” commemorates its 20th anniversary this weekend, reminding us that two decades have passed since Kurt Cobain, Krist Novoselic and Dave Grohl blasted onto the mainstream music scene with this grunge rock demand: “Here we are now. Entertain us.”

Post pop music critic Chris Richards has written a great piece about the moment when “Nevermind” exerted “its whiplash gravity on young America.” But given the significance of the anniversary, it also seemed appropriate to point out a moment that ushered in the era of Teen Spirit — a letter Nirvana issued to its fans prior to the release of “Nevermind.”

In the correspondence — posted on the blog Letters of Note and found via Buzzfeed— the band announces several exciting ventures. They include: a partnership with McDonald’s to issue the Nevermind Happy Meal (“It will not be available in stores, just like another project NIRVANA has been working on, NIRVANA PLAY CHARIOTS OF FIRE AND OTHER HITS); an upcoming tour of shopping malls and county fairgrounds; and “a video cassette demonstrating how to have a tranquil day at the beach collecting driftwood and sea shells.” In case you hadn’t guessed, none of those projects ever came to pass. The letter is being sarcastic. Because that’s what we Gen Xers did best in the early 1990s.

Read more of this gem of a letter — and wallow in more warm, nostalgic feelings for the days when you too were a sarcastic, anti-corporate flannel-shirt-wearer — after the jump.