For quite some time, people have been wearing furry ear/hat items like this to music festivals:
But there's always room for innovation, isn't there? Especially in the name of "science!"
Meet Emoki, which are motorized "animal ears" that you "control with your mind." In other words: it's a little contraption that listens to your brain waves (so it says!) and translates those waves to movement via motorized knobs attached to the contraption. Pop one of the various furry ear pieces — they come in everything from rave-friendly purple to "realistic" animal styles — onto the knobs and there you have it: moving furry ears.
You don't have to wear Emoki's motorized furry ears at a rave, but well, that's probably where they belong.