Endless Birthday Cake Card with Glitter
A sweet, magical birthday card — with a song that absolutely refuses to leave
Everything about this card is sincere. The cake, the candle, the rainbow, the "hope it's magical" on the inside — it's the loveliest birthday card you've ever sent. Right up until they open it. Then a bright, upbeat birthday song kicks in on a loop, and refuses to stop.
That's the whole gag. The card couldn't look sweeter; the song couldn't be more committed. We make a lot of cards that look mischievous from the cover on; this one looks completely innocent right up until the moment it isn't. The recipient will almost certainly laugh and text you "is this still going?!" — which might even start a conversation if you haven't talked in a while. Unlike a paper card that gets read once and tucked away, this one keeps celebrating for hours. For any birthday that deserves to feel a little magical, and last a lot longer than expected.
How the Endless Musical Card Works
- Open the card to test the sound, sign it, then close the card to stop the sample.
- Insert the card into the envelope and pull the tab from the spine to arm it.
- Once they open the card, the song loops non-stop — even if they close it — and plays for hours, until the battery dies.
- If they try to break the card to stop the sound, a hidden glitter trap is waiting inside.
*Plain white envelope included in all cards
Great For
- Her Birthday — the pink cake-and-rainbow cover looks like a sweet, ordinary card, which is exactly why the song catches her off guard.
- A Daughter, Sister, Mom, or Best Friend — sincere enough to actually mean it, relentless enough that she'll never forget it.
- Milestone Birthdays — 16th, 21st, 30th, 40th. The bigger the birthday, the funnier it is that the singing won't stop.
- A Gift From the Kids — they'll pick it for the cake and the rainbow. Everyone else gets the joke about an hour in.
- Someone Who's Seen Every Prank Card — this is the one they won't see coming, because it doesn't look like a prank.
Frequently Asked Questions
Can I sign the card before it activates?
Yes. You can safely sign the card and it will play one-time. Close the card and it will stop.
How long does the song play?
Once activated, the card plays continuously for 3 to 6 hours until the internal battery dies. There is no off switch. Please note; batteries are like a sponge so if they open it again you'll get more music.
How do I activate the card?
We suggest inserting the card into the envelope first the remove the instructional tab from the spine. The moment your recipient opens the card, the song (or sound, depending on your design) starts playing automatically and won't stop until the battery dies or it's broken.
How do I stop the song?
Once activated there is no off switch. The song plays until the battery dies. Attempting to destroy the card triggers the hidden glitter (or in some cases the glitter is found when the pull strip is removed). That's the prank.
Does the card come with a Glitter Envelope
No. All cards ship with a plain white envelope. The glitter is already built inside the card itself, either hidden inside waiting to be unleashed or behind a pull-strip reveal. If you want the full glitter ambush on the outside too, we sell Glitter Trap Envelopes separately.
