Pop_design_somebody_called_me_tonight | COMPLETE · FULL REVIEW |

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.

: 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. pop_design_somebody_called_me_tonight

If you are looking for more decorative or "pop-up" designs, you might consider these alternatives: Hey Ray: Paper Popper Noise Makers The sound is caused by a rapid change in air pressure