Piccolo
The sound of piccolo is an octave higher than the flute and this instrument is shorter, about half of flute length, having the most high sound of an symphonic orchestra.
How does it work?
Its sound is produced similarly as the flute, when the musician blows the air in the mouthpiece of instrument.
A bit of history...
In the past, the piccolo was built only of wood, such as the other wood wind family instruments. Nowadays, the modern piccolo can be built all of metal, or with its head of metal and wood body, or also completely of wood.
Piccolo built by G. Astor & Co, Londres, 18th century.