Endless Baby Shark Birthday Musical Prank Card with Hidden Glitter

This diabolically delightful Baby Shark birthday card transforms the world's most infectious children's song into an unstoppable birthday celebration that plays for hours. What appears to be an innocent shark-themed birthday greeting becomes a 5-10 hour musical marathon that your victim will never forget (no matter how hard they try).

How the Endless Musical Card Works 

1. Open the card to test the sound; sign it, close the card to stop the sample
2. Insert the card into the envelope; pull the tab from the spine to arm it.
3. Once the recipient opens the card it will start and loop non-stop even if they close the card; it will run until the battery dies; hours later
4. If the recipient tries to break it we hid glitter inside the card

*Plain white envelope included in all cards

Perfect Occasions for Baby Shark Birthday Chaos

• Kids' birthday parties (especially for Baby Shark superfans)
• Adult birthday pranks (for anyone who's had the song stuck in their head)
• Office birthday celebrations (guaranteed to clear the room or unite everyone in shared musical suffering)
• Shark-themed birthday parties
• Revenge gifts for parents (payback for all those toys that made noise)
• Any time you want to ensure a birthday is truly unforgettable