Start swishing a Slinky back and forth, shifting its weight from hand to hand, and it can be awfully hard to stop. But, sometimes you have work to do. That's when Slink-O-Matic comes in, the automatic Slinky slinker that will shift the metallic coils from one side to another all day long, if you like. It's the creation of Jim Sellers, is beautiful in its simplicity, and we're told also doubles as a hemisphere detector: the Slinky will "slink" from right to left in the north and left to right in the south. There, now you've learned your "something new" for the day.