The Joker Birthday Card is a prank musical card that, once started, won’t stop playing its annoying birthday song until the battery runs out or the card is destroyed. The card is the creation of brothers Travis and Nick Peterson, and, as a video shows, the card can even withstand being submerged in a bucket of water.
Another feature of the card is that if the play button is pressed again after the music starts instead of stopping the music it only makes it louder. The Petersons claim the card will play continuously for about three hours, and they have uploaded a video of a prototype of the card playing for nearly five. The card is being funded through an already successful Kickstarter campaign.
via Dude I Want That