MANKATO — The 3D printers at Mankato area secondary schools are not sitting idle while students are learning from home. Teachers took the high-tech printers home and are using them to make hundreds of ...

So I fired up a 3D design program, in this case the easy-to-use (and free) browser-based Tinkercad, and started designing my own set of mask clips. One of my favorite 3D printing tricks is to combine ...