Hohner harmonica

This harmonica is a genuine musical instrument, with which you
can play lots of great tunes. It has 10 holes,each of which
contains two notes. One note sounds when you blow,the other
when you draw.Holes 4-7 contain all 8 notes of the C major 
scale. To play them,purse your lips as if you were whistling 
and place them over the desired channel opening. First blow,
then draw and the notes will sound.