Endless Baby Shark Birthday Card with Glitter
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Shop EU PartnerThe song every parent fears, now in a birthday card they can't turn off
You know the one. The shark song. The melody that moves into a household and never pays rent. This card plays our own take on it — same infectious bite, with a Daddy Shark verse that's a little more aggressive than the version stuck in your head. The cover wishes a "Happy Birthday: Hope it's jawsome," and the moment they open it, the song kicks in on a loop and refuses to stop. The inside is blank.
For the kids, it's a delight — they'll want to play it again and again, which is exactly the problem. For the parents, it's a birthday card and a gentle act of revenge in one. The recipient will almost certainly text you "are you SERIOUS?!" — which might even start a conversation if you haven't talked in a while. Unlike a paper card that gets read once and forgotten, this one keeps singing for hours. For any birthday that could use a little harmless, catchy chaos.
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
- The kid who requests Baby Shark on repeat — now it loops back at them, and the parents will know exactly who to thank.
- The parent who's heard it a thousand times — affectionate payback in card form, doo-doo-doo until the battery dies.
- Shark-themed birthday parties — hand it off as a favor and it becomes the whole afternoon.
- One parent to another — they'll laugh, then start plotting the revenge card they send you back.
- Office birthdays — a few minutes of this either clears the room or unites it in shared suffering.
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.
