We have seen the future of prosthetics, and they may all soon be 3D-printed at home. Simply put, a geeky father, Paul McCarthy, was looking for an inexpensive but functional prosthetic hand for his son Leon, who was born without fingers on his left hand. Thanfully, he stumbled upon a video about a prosthetic hand that anyone could make with a 3-D printer, based on a design by Washington state inventor Ivan Owen. So, he spent $2000 on a 3D printer and around $10 on materials to create a functional prosthetic for his son. Continue reading for a video.