Fun is the stereotypical appeal of technology to youngsters. But, Heidi Hertel knows that function can sometimes be just as important. Hertel is founder and president of Fitz Frames (FF), which 3D-prints custom eyewear for kids.

The company designs the eyewear in Los Angeles, but manufactures them in Youngstown, OH. Its custom approach offers frames that are better fitting, more flexible and lighter than standard plastic models, with snap fit hinges to reduce breaking.