It was my generation’s Bitzee. So what did a pet rock do? Well, absolutely nothing. It cost $4 and was just a rock, nestled in a box with some straw. Oh, yeah, it also came with a book that ...

Pet rocks, a kooky and best-forgotten fad of 1970s America, are resurfacing in South Korea. Unlike the stone-in-a-box craze nearly five decades ago, the sequel is more about serenity than shtick.