Quote Originally Posted by cloves
was "bending" notes. How do you do that?
As you have your finger-tips over the holes, take the lowest finger and gently lift the tip of the finger up so that the air coming through the hole is only open about 1/2 way.

As you progress up the whistle, you will take the finger and slowly tip-up the note to allow a little air out. You'll get the touch pretty quick. It's really the only way to translate from flute to whistle with any speed.

When you're playing in the third octave, it's the only way to augment notes since the air flow is too strong to decipher between 1/2 open and fully open.

Have fun, and try to play "Bouree" from Jethro Tull. It's a GREAT, slow tune for learning the augmented notes.