It looks like a cheerful congrats card — "Congrats to you-ay-hee-hooo!" yelled across the peaks. Then they open it, and the yodeling begins: a full, traditional yodel echoing out, and it does not stop. Close the card and it keeps yodeling. Set it down and it keeps yodeling. It loops nonstop, even when closed, for hours until the battery dies. You can open it to test the sound, sign it, and get it ready first; it only arms once you pull the tab.
That's the whole joke. They reached the summit, and this card won't let them forget it — celebrating their big win at full volume from the top of the mountain, long after they wish it would come down. A card that won't quit beats one that gets read once and recycled, and this one keeps echoing long enough to earn a "what did you send me?!" text. For anyone who just hit a peak worth shouting about — a new job, a graduation, a promotion, or any summit they climbed.
Plain white envelope included in all cards