Applications for Goodfellow's PEEK film include x-ray windows, instrument windows and flexible printed circuit boards. The cost of the film varies based on quantity and size, but according to the Goodfellow website one 150 x 150 mm sheet of film costs $189 and 20 of them cost $414.
A make-your-own Star Wars Sith Lightsaber hilt is heftier and better-looking than most others out there, according to its maker, Sean Charlesworth. You can 3D print it from free source files, and there's even a hardware kit available -- not free -- so you can build one just in time for Halloween.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies.
You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived.
So if you can't attend live, attend at your convenience.