If you are a lefty, feel free to follow the directions below by using the opposite hand than the one indicated in the instructions.

1. Put your left hand out in front of you, so that your palm faces up. Your hand should be relaxed, as opposed to stretched perfectly flat.
   
2. Cup your right hand and place it so that the bottom edge of your right hand fits into the groove that marks the place where fingers and palm of your left hand meet. The knuckle at the base of your right pinkie should be aligned with the meeting place of your left ring and middle fingers.
   
3. Bring down the fingers of your right hand so that they close like a lid over the fleshy part of your left hand that connects your thumb and pointer finger. Also close the fingers of your left hand so that they’re against the back of your right hand. Don’t squeeze your hands together—your two hands should comfortably and effortlessly form a kind of cave between them.
   
4. Still without squeezing, close your hands more fully together so that the bases of your thumbs are touching and the knuckles of your thumbs are aligned. The tip of your left thumb should be right on top of the middle knuckle of your right pointer finger; the tip of your right thumb should be touching the tip of your left thumb. In this position, your two thumbs should form a natural hole between the first and second knuckle that resembles the hole on a flute.
   
5. Bring your hands up to your mouth so that the first knuckle of your thumbs is between your upper and lower lip—as if the knuckle is the lip of a glass and you are about to take a sip. Position your hands so that your thumbs are angled at about a 45-degrees away from your lips.
   
6. Blow. You should not be blowing directly into the hole between your thumbs. Instead, you should be blowing down your thumbs and into the bottom of the hole. You can affect the pitch of the whistle by opening and closing the fingers of your left hand, much the way a harmonica player does.