Emma was born with arthrogryposis multiplex congenita (AMC), a rare disease that cripples joints and limbs. Because of this condition, the two-year-old girl couldn’t play with blocks, bring food to her mouth or hug her mother.

That is, until engineers at the Nemours/Alfred I. duPont Hospital for Children used a 3D printer to create a durable exoskeleton that helps her lift her arms. Emma was able to lift candy to her mouth for the first time while wearing the supportive plastic vest.

The Wilmington Robotic Exoskeleton (WREX) is made of hinged metal bars, resistance bands and tiny 3D printed parts. Emma calls them her “magic arms.”

Emma was one of the first patients to wear the WREX. Now, about 15 of the hospital’s littlest patients are wearing the lightweight vests. The ease of 3D printing makes customization of parts possible. When a piece breaks, on-demand printers enable quick fixes. If a child outgrows a vest, the engineers can simply print larger parts out.

“She outgrew the first one and now we’re on our second one and it’s still evolving,” said Emma’s mother, Megan Lavelle. “It’s still growing into this incredible prosthetic that helps her to use her arms.” Watch the video above to learn more.

Do you think on-demand 3D printing in hospitals will become increasingly popular in the future? Share your thoughts with us in the comments.