Yes, lots of us have made cat ears move with our minds, or raised a ball in a tube by concentrating, or played with some other kind of EEG-activated toy. Reading general states of focus with electrodes, then correlating it to some kind of activity, is an old trick — and one that’s often oversold. But sometimes, there’s a great fusion of form and function. Because Star Wars is a weirdly perfect fit for mind-controlled toys, and it always will be.Last year’s Tribeca Film Festival interactive show gave us a BB-8 droid you could move with your mind. …