You know those obnoxious cards that play music every time you open it? Yeah, this ain't one of 'em. Instead! This card, a wedding invitation, packs its own record player. You'll have to line up the "needle" and spin the record to get it to play.
It's clever! The song is an original made by the couple getting married and the card was made by their great friend. She explains what the card is made of:
The resulting booklet is comprised of a cover, two inner pages, a letterpressed band (with instructions and a tear-off RSVP postcard), and a flexdisc on a screwpost. The recipient bends the second page of the booklet back to create a tented "arm." With the needle placed, they then carefully spin the flexidisc at 45 RPM (ish) to hear the song. The sewing needle travels the length of the song and produces the sound.