: Grip the bottom corner of the bar (not the flaps) and thrust your arm downward quickly. The air will force the flaps out, creating a loud snapping sound. Scientific Principle
You can create a loud, easy paper popper using a single sheet of . pop_design_somebody_called_me_tonight
: Hold the corner of the folded bar and pull the outer corner of the paper down. This should create two "pockets" or heart-shaped openings at the bottom. : Grip the bottom corner of the bar
: Turn the paper over so the folded bar is on the back. Fold the entire paper in half vertically, so the "smooth" side is on the outside and the folded bar is on the inside. : Hold the corner of the folded bar
: Place the paper in a horizontal (landscape) position. Fold a small "bar" at the top edge down about an inch.
The sound is caused by a rapid change in air pressure. When you thrust the popper down, air gets trapped in the pockets. The force pushes these flaps out at a high velocity, creating a that we hear as a pop, similar to popping a paper bag.