Meet the best prank greeting cards EVER! It’s a take on those cards that plays a tune when you open it. Except this one? This one doesn’t ever stop playing. Not until the batteries run out, or you destroy it completely. SET IT ON FIRE! You can buy one (or all of them!) over at Kickstarter starting at $12. I know what you’re thinking and yes, $12 is a lot for a card. But think about it! This one never stops playing music, annoying the recipient forever. Totally worth it.