This classic prank is perfect for everyone! Tell your friends you just got back from a trip to the desert and you brought them back a souvenir. Watch them open the bag and jump! A wound up elastic inside the bag releases when opened and creates a loud buzz...gets them every time. Wind-up the rubber band and washer. Place it in the bag. When an unsuspecting person opens it, they get a scare. Expecting to see small killer bee eggs, they hear a loud noise instead.