Follow me to learn how to whistle
First,puck up yr lips to form a hole where you can put the tip of yr little finger into.
Second,keep the tip of yr tongue near the inside of yr lower incisors naturally.
Third,breathe in air deeply.
Note:the hole size,the place of the tongue tip and breath all may be readjusted.
You can whistle after trying again and again!Congratulation to you!You can whistle songs or song-birds after trying again and again!