Confetti is the small bits of paper that you festively throw at a celebration. People at New Year's parties often mark the stroke of midnight by tossing confetti into the air.
It's traditional to throw rice at the newly married couple after a wedding ceremony, but sometimes guests throw confetti instead. Other places you might see (or throw) confetti are parades, game shows, sporting events, and parties. Confetti is usually made of paper, though sometimes it's plastic or shiny mylar. Confetti is the plural form of the Italian confetto, "sweetmeat," and the tradition began with small candies thrown during Italian parades and celebrations.