1. Fold the paper in half along the longest side and open it out again.

2. Fold each corner down to meet the line of the center fold.

3. Fold the paper in half along the center fold.

4. Fold the paper in half again, press down the crease and firmly open it out again.

5. Fold the widest corns down as shown in the diagram.

6. Fold the paper back to make a triangle shape.

7. To fire your paper popper, hold it by the long end and swish it sharply down through the air.