A Guide to the Orchestra is the title of a concert whose protagonists will be ... symphony orchestra. You will learn how the instruments are divided into groups, what their technical and expressive possibilities are, as well as thow they cooperate to produce the magnificent ochestral sound.
The subject will be introduced with the Variations and Fugue on a Theme of Purcell op. 34 "The Young Person's Guide to the Orchestra" by Benjamin Britten. It is a piece that the composer wrote with children in mind. In it, he introduces young listeners to the largest and most complex musical ensemble, presenting individual instruments.