The document describes the various instruments that are part of the classroom's collection, organized into categories. It includes Orff percussion instruments adapted for teaching music, such as xylophones, metalophones, and glocksnpiels made of wood or metal. Other percussion instruments mentioned are maracas, sleigh bells, temple blocks, guiros, and percussion boxes. The document also notes instruments that make sound through vibrating membranes (membranophones), strings (kazoo and guitar), wind (recorders), and electricity (electronic instruments).