Many years ago I built a product called the beavis board. It was a very cool piece of equipment with a huge stock of parts and a bunch of projets ready to go. As a product, it fizzled, but as a prototyping/learning tool, it still works great. You can build your own beavis board with commonly available parts. You can read the awesome user guide to learn more about building and prototyping. Then you can head over to the projects page to explore each of the 30+ projects.
Copyright (c) 2016 beavis audio research