'The Orchestra', a non-fiction book for children, introduces musical instruments, basic musical concepts and the symphonic orchestra. The very straight-forward text is accompanied by playful, but accurate, drawings. A number of musical concepts are explored, among them harmony, tempo and dynamics. The role of the composer and conductor are explored and each musical instrument described. A subplot, apparent only through the illustrations, shows two children who wend their way through the orchestra's rehearsal, visiting the instrument families, and culminates in a full-dress concert. Comprehensive, but simple in its approach, the book combines solid information with an enjoyable format. AUTHOR: Mark Rubin has produced a number of films and television shows for young children. Victor Feldbrill, conductor of the Toronto Symphony program for young children, has reviewed the text for accuracy. Alan Daniel has illustrated a number of books, among them 'Flying and Swimming Creatures' and 'The Bait Chopper'. Full colour illustrations throughout.