A simple rubber band harmonica that will make a variable buzzing sound based on how much you squeeze the mid section. Requires just 3 printable pieces (1x main body, and 2x Caps), and one wide rubberband.

Printing instructions: Shouldn't be much to printing this standard PLA settings worked for me. Try to keep the infill on the lower side I used 15% on the main body so its not as rigid.