“3D printed prosthetics from e-Nable and other non-profit groups have thus far focused on very simple hands that can be printed for less than $50. Corredor’s hand cost about that much and has allowed the teen to learn to play a mean electric guitar.”
http://techcrunch.com/2015/02/02/teen-can-play-guitar-thanks-to-a-3d-printed-prosthetic-hand/
Great to technology worked for the greater good