The MKRZero is basically a really, really small microcomputer with a number of outputs and headers as well as a battery management system and USB control. It’s great for learning or building 32-bit applications and it’s small enough to fit inside almost anything.
Little boards like this one are great fun and are always valuable experimental and hacking tools. At a mere $22 you could probably pick one of these up and learn a little Arduino programming in your spare time which is more than you can say for a pink fairy armadillo. All that little guy will teach you is how to love again.