How to build something ‘useful’ with a Raspberry Pi

In honor of Pi Day, Chaim Gartenberg and I cooked up a tiny little Raspberry Pi project for yesterday’s episode of Circuit Breaker Live.
We started with a simple concept: a button that says “Why?” when you press it, in honor of our favorite podcast. So we knew we’d need a button, some sound files, a little bit of Python code, and, of course, a Raspberry Pi.
A new Pi is $35, but we found an old Raspberry Pi 2 in my desk drawer, which was up to the task. (Newer Pis have bu