Is It Defective, or Haunted? Neither — and that's the whole joke. This Halloween card looks innocent until they open it, then it lets out a blood-curdling scream every 90 seconds and does it again, and again, with no obvious way to make it stop. They'll check it for a dying battery. They'll wonder if the house is haunted. It's just you, saying happy Halloween. 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 it, a scream plays every 90 seconds — even if they close it — for hours, until the battery dies. The glitter is packed around the battery compartment, so when they pry it open to kill the screaming, glitter spills everywhere. Plain white envelope included. Great For Halloween pranks — a scream every 90 seconds turns any room properly haunted until the battery dies. The friend who's brave until 2 AM — for the one who swears nothing scares them. Office Halloween — a scream going off every 90 seconds from a desk drawer becomes the story everyone retells. Birthdays and year-round laughs — the scream gag lands just as well on a birthday as it does in October. Anyone who tries to make it stop — prying open the battery to kill the screaming is exactly when the glitter gets them.