The possibility of using 3-D printers to create unregistered guns is a highly sensitive topic now making the rounds through the court systems. The idea is something we grapple with here at home as well.

3-D printers continue to become more and more accessible as a learning tool for young children. At the Rapid City Public Library anyone can go in and use any of their printers to create just about whatever they want. They can choose from a variety of templates, or bring in schematics of their own.

These printers do not have the capability of printing guns, but they could be used to make small weapons, like knives - something library officials say goes again their policies.

Carrie Bond is the librarian in charge of makers space where the printers are located.

"The public library has a policy that we do not print any dangerous objects so anything that could be used to harm another we are a hard no on," Bond said. "And if people come close, usually we steer them in another direction by bringing up something else that they're interested in."

Bond says a there's always a librarian in the makers space and no design can be printed without a librarian seeing it.