Description: This is a simple trick to whistle using a blade of grass
Start by finding a blade of grass at least two inches long. Bermuda Grass works fantastic for this because it’s a stronger blade.
Place the blade of grass between your two thumbs pinched between the first knuckle and the second knuckle. You should see a long oval shaped hole split down the middle by the blade of grass.
Place your mouth over the hole and blow lightly. You have to find the exact speed of which to blow at. You also can vary the tightness of the blade by moving your thumbs slightly to change the pitch of the whistle emitted.
Result: You can play very simple songs with this technique.