And the Official Musical Instrument/Noise Maker of World Cup 2014 Is…
…the caxirola (pronounced “kashirola.”). Unlike South Africa’s infuriating vuvuzela (the horn that tortured everyone at the last World Cup), the caxirola is a percussion instrument based on an earlier thing called a caxixi. Instead of a blare that sounds like a swarm of killer bees (or, if you’re a Winnipeg Blue Bombers fan, a touchdown), it’s kind of like a rattle.
As an addendum – while it is the official noise maker, it has been banned from the World Cup venues/stadiums themselves (cited as a safety hazard after they were thrown onto the field at a previous match). – http://www.newyorker.com/online/blogs/sportingscene/2014/06/world-cup-caxirolas-the-newer-better-banned-vuvuzelas.html