POLK COUNTY—Academically gifted students became 3D designers and makers this summer during a weeklong camp that introduced them to the technology and engineering behind 3D printing. The “3D Printing with TinkerCad” camp was part of the AIG Summer Seminars series and was funded by the Polk County Community Foundation. Polk County Middle School career and technical education teacher Matthew Dellinger led students through a combination of hands-on …