Here's how to play "My Bonnie" on the harmonica. (Numbers are the holes, a '-' means draw)
 6  8  -8    7  -8 7  -6  6   5
My Bon-nie lies ov-er the o-cean,
 6  8  -8    7   7 -7  7   -8
My Bon-nie lies ov-er the sea,
 6  8  -8    7  -8 7  -6  6   5
My Bon-nie lies ov-er the o-cean,
 6   -6   -8   7  -7 -6  -7  7
Oh bring back my Bon-nie to me.
  6     7     -6   -8
Bring back, bring back,
 7   -7   -7  -7  -7 -6  -7  7  -8  8
Oh bring back my Bon-nie to me, to me,
  6     7     -6   -8
Bring back, bring back,
 7   -7   -7  -7 -7  -6  -7  7
Oh bring back my Bon-nie to me.