Sarah Pease has created these fantastic mason jar speakers from open-source hardware (ie basic Radio Shack type stuff with free instructions) and a standard household item. The cool part is that since the speakers are actually mounted to the lid of the jar, you could swap out the jars to experiment with different sizes and widths for different sounds. They look really simple and attractive and anyone with some basic skills can make their own set. And when you’re all done listening to music you can preserve some berries for the winter in them. Win, win, yum.