Sugar Plum Swing Out, Dance of the Knock Kneed Fairy, and Tango - Three up-beat arrangements originating from Tchaikovskys Nutcracker ballet. Flexible in its scoring, this set contains a full score and four parts allowing performance on either 3 alto saxophones, or 2 altos and a tenor.SAXOPHONE TRIO. Pieces in book are approximately Grade: 4 - 5 standard.