Noseflute

The Nose Flute is fun to play with. You press the nose flute 
firmly against your nose and mouth. The big part goes over your mouth, 
and the small part goes against your nose. Hold your mouth well open. 
Blow air only through your nostrils, making sure that no air leaks 
form the edges of the nose flute.
The air blows across your open mouth, and by adjusting the size 
and shape of your open mouth, you can create various pitches. 
With a little practice you can create quite musical sounds.