Origami has been used in celebrations for thousands of years. During Chinese New Year, one tradition is to light fireworks to scare off evil spirits and misfortunes from entering the upcoming year. An origami clapper mimics the noise made by a popping firecracker, making the clapper a good origami figure to fold and throw for Chinese New Year. You can make one pop by grabbing the end and "throwing" it like you would a baseball, without letting go.
Fold a corner over diagonally on top of itself, lining up with the middle. Fold the opposing corner over in the same manner, meeting in the middle.
Repeat the same folds on the other end of the paper. Fold the paper in half so the points meet. Fold the paper in half again, bringing the angled and flat edges together, and rotate the point so that it is pointing toward you.
Open the top layer and fold it flat along the crease. Fold the next layer over on top of the last fold. Open the following layer, folding it flat along the crease and making a diamond. Fold the paper in half along the crease to make a triangle.