Survival Whistle Out of Paper

this is how to make a survival wistle out of paper.

Step 1: Cutting

cut the paper 4 x 2

Step 2: Folding

fold the paper as shown

Step 3: Cutting

cut the paper as a  v  shape

Step 4: "whistling"

put 2 fingers on the flaps and blow. it should sound like a screech