Expanding a bit on my previous response, with the college engineering courses.
Mechatronics Lab was a junior-level course. Start by messing around with stuff (Arduino and some random sensors and other similar things) and end up building a robot and a free project. Surprisingly enough, I think the video from my group’s is still on Youtube if you know what to look for. (My group went early in the class. Then we sat around waiting for someone else to come remotely close to our time. Nobody did.)
Then there was Sophomore Design and Product Development, an ME/EE/CS course pair. The goal of Sophomore Design was to come up with a (relatively simple) class project, design it, build it, and make sure everyone in class had one. Mine is still somewhere around my apartment; if someone asks I’ll have to take a picture and post it. Product Development focused more on “you have a product, now start a business” aspect of things, teaching marketing, business operations, and other similar things. The product didn’t matter quite so much in that one as the business did.
One final class: CAD/CAM. This wasn’t quite what was advertised–you had to do a fair bit of CAD, but most of the course was on Design for Manufacturing. Dr. Dolan (who also taught the previous course pair) would go over GD&T, and how to think about tolerancing and set it up to make the technicians’ lives easier. That’s another class that I might not use every day, but I use the principles a lot.
One final note: I kept all my engineering textbooks instead of selling them back. The most useful one–Machine Design 1 & 2–is in my office at work because I’m referring to it a LOT. That was a very interesting course pair, and I refer to the book on a regular basis to look up things like how to calculate gear tooth stress or (this week’s check) “what was that buckling equation again?”, or look up the material reference in the back. For anybody in the engineering field, I’d recommend doing something like that, particularly for advanced but “useful anywhere” topics. (I will say that the Machine Design textbook has occasionally disappeared to a coworker’s office for a few days…)