Orff instruments include all of the following EXCEPT:

Orff instruments are specific types of percussion instruments designed and used for the Orff approach to music education. This approach emphasizes active music-making and the use of rhythmic, melodic, and harmonic experiences. Instruments used in this method are typically accessible and designed for children, including xylophones, glockenspiels, metallophones, and various hand percussion instruments.

Upright pianos, while integral to a broader music curriculum, do not fall under the category of Orff instruments. They are traditional keyboard instruments not specifically designed for the interactive, exploratory, and elemental characteristics of the Orff approach. In contrast, hand instruments, bass xylophones, and body percussion are all central to the Orff philosophy, as they promote group participation and encourage creative expression through music. Thus, upright pianos stand apart from the defined set of Orff instruments.