Adafruit has a step-by-step guide to making the helmet, which of course it also sells parts for, but the basic process is shown above: you download the design file, resize the helmet to fit your ...

We continue our 3D printing discovery series by showing you how quick and easy it is to customize the size of pre-designed objects -- without ever going into a 3D design program.

An aeromechanical engineer has managed to design and 3D print a fully functional, fully assembled tape measure.