The Evil-Tron is an electronic gadget not much bigger than a quarter. It’s got a strong magnet, so you can attach it just about anywhere, like under someone’s desk, or in framework rigging for the suspended ceiling.
What it does is make sounds — “unidentifiable scratching sounds,” or “eerie whispering ‘hey, can you hear me?” — at random intervals, and so mess with someone’s mind. Just the thing to get your coworkers.
I have got to get me one of these. Or … perhaps … the economy pack: get three for just $18. Hmmm….