Instead of going off the shelf, doctors turned to a 3D printer from Stratasys to create custom molded parts and a lightweight vest for Emma. The result: the two-year-old who once could not lift her arms is now able to play, color and feed herself. Printing the parts also solves another major issue — Emma is growing… quickly. The adorable tot has already outgrown her first vest, but her mother just calls the Nemours/Alfred I. duPont Hospital for Children and has a new one made. The same goes for replacement parts. Should a hinge or brace break, it need only be a matter of hours (not days or weeks) before a new one is delivered.

Engadget: 3D printed ‘Magic Arms’ give a little girl use of her limbs

It reminds me of this DIY project for building prosthetic fingers