Book 3 introduces the concepts of key, key signature, scales, triads,
tones (whole steps), and semitones (half steps) in a novel and exciting
way. Each key is a group of characters or objects with note-names (i.e.
a band, a birthday party, a clothes-line with garments). Certain notes
belong, while all other notes (accidentals) are outsiders. Transposition
is a natural outcome of this concept, with a tune moving from one group
to another. The child masters eight new notes (up to Treble High G and
down to Bass Low F), which facilitates the playing of more adventurous
repertoire. The semiquaver (sixteenth note), semiquaver rest (sixteenth
rest), dotted crotchet (dotted quarter note), and dotted quaver (dotted
eighth note) are introduced, and tempo markings are now in Italian. As
in the previous two books, ensemble-playing is encouraged.