There is something fundamentally satisfying about building things that bridge the gap between your code and the physical world. This father/daughter duo will show you how they've bridge that gap.
I frequently find Rubyists that are interested in tinkering with hardware but are often intimidated by the idea. Turns out, it is so easy even a grown-up can do it. In fact it is easier than it has ever been. And the best part is, you can use little Ruby.