Here are documents which explain the notes on the neck.
Click on the image to download the PDF.
Notes on the First String.
E, F and G.
Notes on the Second String.
B, C and D with the song Go Tell Aunt Rhody.
Notes on the Third String
The notes G and A with the Alphabet Song.
Notes on the Fourth String
The notes D, E and F with the Snake Charmer song.
Notes on the Fifth String
The notes A, B and C with a Russian Folk song.
Notes on the Sixth String
The notes E, F and G with Yankee Doodle as a duet.