This prototype solves the Challenge: "Music to my ears" Create an object that makes sound or music, with the following parameters: "Permanent" and "Design for Them" This door harp becomes part of your house when you attach it to a door. It should use the door as a resonator to increase the volume of the musical notes that it plays when the door is used. The parametric design allows you to "Design for Them" by changing the number of notes played, and various dimensions of the harp. Customize by using the free openScad program and downloading the .scad file. openscad.org