Product Description The Ultimate Prank Mother's Day Card! All our prank cards come NOT ACTIVATED so that you have a chance to sign the card and send it off to your mum. This endless Mother's Day card plays a rather unpleasant and potentially PTSD inducing loop of "mum, mummy, mamma, mum, mum!" The nagging loops non-stop , opened or closed, until the battery dies + glitter inside if/when she rips it apart. Add EXTRA spice to your card with our Flying Butterfly Card Prank Instructions for use: Step 1 - Open the card and add your personal Mother's Day message. The song will play when opened so you can hear the sound! .