12 pipe panflute tuned to the "Mojave" scale (Natural minor, Melodic Minor (Descending) Scale: semitones 2-1-2-2-1-2). The low note is D4 (whole step above middle C on a piano). The panpipes are around 11 inches in length from top to bottom of the longest pipe. Color materials are water reactive! Seal with water-resistant finish (e.g., shellac, polyurethane) if you wish for this to be more than decorative. The pipes are tuned to the indicated scale, and thus can be played.
Videos and sound of 3D printed panflutes:
Japanese Hirajoshi Tuned
Middle Eastern Hijaz-Kar tuned: