In 1995 a bone flute was found in the Divje babe cave site in Slovenia. It was dated c. 36,000 years old, and at the time of its discovery, it was the oldest known musical instrument. The flute was quite damaged, so its reconstruction was met with some skepticism.
While attending a workshop called "3D Printing for Acoustics" at Stanford's Center for Computer Research in Music and Acoustics, I produced this open-source replica of the flute. The model was based on the work of archeologist Ivan Turk1. I tried to copy the shape of the flute as closely as possible, and ended up with a flute that is pretty difficult for me to play, though I'm not a professional player. I have at times managed to play several notes with it. The model is available to print or modify on Thingiverse, allowing for further study and evaluation.
1. Kunej, D., & Turk, I. (2000). New Perspectives on the Beginnings of Music: Archeological and Musicological Analysis of a Middle Paleolithic Bone "Flute" In N. Walin, B. Merker, & S. Brown (Eds.), The Origins of Music (pp. 235-268). Cambridge: The MIT Press.↩