Well, for example, my (sighted) cats have a toy that spins a wand in a circle, but does so at a constant speed for a few minutes then turns off. I'd like to build one that moves in less predictable patterns, sporadically, over a longer period of time, without using much battery while not moving.
The hardware components aren't that hard to assemble, the programming is easy, but I'm at a loss with where to begin for building a simple housing where a motor can attach with a wand mounted to it. I'm sure it's very basic fabrication stuff, I just don't know where to begin.