**Boolean functions**, sometimes also called switching functions, are functions that take as their input zero or more boolean values (1 or 0, true or false, etc.) and output a single boolean value. The number of inputs to the function is is called the arity of the function and is denoted as *k*. Every *k*-ary function can be written as a propositional formula, a sentence in propositional logic. A binary Boolean function, a Boolean function with two arguments, can be described by one out of sixteen canonical formulas.

The RadioShack here in town, *my* RadioShack, is finally closing its doors forever after more than ten weeks of clearance sales the likes of which I won’t likely ever see again. I scored a lot of cool gadgets at ridiculously low prices, but my favorite continues to be the littleBits modular electronics system. As I’ve previously written about, my introduction to littleBits was via the cloudBit Starter Kit and the Arduino Coding Kit. Since then I have been grabbing a handful of the individually packaged elements on my weekly trip to the Shack. Now that my harvest has come to its inevitable end, I’m posting my take. A few of these were included in the kits I had bought as well, but I know I don’t have to remind a fellow tinkerer that too many of anything is never enough. Now for the pictures …