A heartwarming new video documents the story of a small child whose life has been radically changed for the better because of 3D printing technology.

Two-year-old Emma was born with a rare disease called arthrogryposis that makes it so she can’t raise her arms without assistance. Through the use of 3D printing, a Delaware hospital created a mobile plastic exoskeleton that now allows Emma to use her arms for many things.

3D printing ensures that a new exoskeleton can be created if Emma breaks or outgrows it. Emma is now on her second 3D-printed jacket and calls the device her “magic arms.”

The video was created by 3D printing business Stratasys, which recently merged with Objet in a $1.4 billion deal. A Stratasys 3D printer was used to create Emma’s jacket.