Banger -

Lay your paper flat and fold all four corners toward the center line to create a symmetrical shape.

Fold the paper in half along the length, then fold it in half again widthwise to find the center. banger

A "paper banger," also known as a paper popper or flapper, is a simple origami toy that makes a loud snapping sound when flicked quickly through the air. The sound is caused by air rushing into a folded pocket, forcing it to pop open rapidly. How to Make a Simple Paper Banger Lay your paper flat and fold all four