I wanted to know what type of component or module I could use to make a hollow ball move. I have these hollow plastic balls (think empty easter eggs) that I was going to put a nano in and a sound detector and was just hoping to just get it to move. I prefer a sort of a tilt left and right effect, but if it just rolls randomly that would work as well.
I was thinking just a simple vibration, but it doesn't really shift the ball at all, so I'm at a loss without building something quite complex with magnets or something. Perhaps a motor stuck to the side?