article_snippet: The 7-year-old,  grabbed the replacement as soon as the replacement came off a 3-D printer on Tuesday in Los Alamitos, California.
article_snippet: The prosthetic was constructed overnight at the Build It Workspace studio.
article_snippet: The prosthetic represents a breakthrough in small, lightweight hands that are economical and easy for children to use.
article_snippet: But when it came to getting one custom made in a day by a 3-D printer, that was a different story.
article_snippet: It didn't hurt, either, that the appendage, called a robohand, looks a lot like the pair Marvel superhero Iron Man wears. '
article_snippet: It's an amazing thing to be doing,' the company's president and founder said of making a hand that weighs less than a pound out of the same kind of plastic used in automobile parts.
article_snippet: Although Lengsfeld's company has printed out everything from pumps for oil and gas companies to parts for unmanned aerial vehicles, this is the first hand he and he three employees have built.
article_snippet: Airwolf 3D, whose printers built Faith's hand, recently cranked out 200 hands for children around the world as part of an international competition to see which company could use the most 3-D printers in one space at one time.
article_snippet: Airwolf, with 159 printers going, won by one, said Airwolf's creative director, Tyler Caros, who was keeping watch on Monday as the hard plastic going into Faith's hand slowly unspooled.
article_snippet: Faith's parents were working with the nonprofit group E-Nable to get her a 3-D-printed hand, but the technology is so new there's a waiting list, her mother said.
article_snippet: E-Nable provides open-source technology for building the hand, Lengsfeld said, making Lengsfeld economical for anyone with the right printer and a set of instructions to create one.