A celebration cracker (or Christmas cracker) is a festive, paper-wrapped cardboard tube containing small gifts, a paper crown (party hat), and a joke, which makes a "bang" sound when pulled apart by two people, originating from a 19th-century British tradition. In this set each cracker is a musical whistle pitched to a different note along with a hat. There is also a musical score sheet. Read info on the box for more details.