At 7 years old, Faith Lennox had learned to do most everything with one hand. She was born with a congenital abnormality called compartment syndrome, a condition where the body pinches off blood supply. This syndrome eventually led to Faith's left arm being amputated just below the elbow, when she was 9 months old. At the age of 3, Faith was fitted for and used a traditional prosthetic hand, but outgrew it in two years. After battling an insurance company, who did not want to cover a new one, her parents had to make the decision to "do without" until they found a better solution (since new, traditional ones cost as much as $15,000 to $20,000).
Her new arm is in her favorite colors, weighs just a pound and has just a $50 price tag. Build It Workspace, which created the hand with 3D printers, is less than a year old and is owned by Mechanical Engineer Mark Lengsfeld. This was his first attempt at prosthetics.