Created by the Freenotes Company of Hesperus, Colorado, Harmony Park Musical Classroom is an interactive public art exhibition on the PACE Center’s East Patio. These outdoor wind and percussion instruments are weatherproof and designed to be played together easily because they are tuned to the pentatonic scale. There are no wrong notes; all of the sounds are harmonious, and knowledge of music, keys or scales is not necessary. The sounds are mellow and ethereal so as not to disturb others. All instruments are wheelchair accessible, and they can even be a tool for music therapy to improve cognitive ability, communication and motor skills.