Apparently all the people who came of age in the late 1960s and early '70s are either dead or too busy filling out Social Security forms to notice that at least one of their cherished craft projects is making a comeback. (No, not candle-splattered Mateus wine bottles or macramé hanging plant slings.) We're talking about terrariums, the terrestrial equivalent of a ship in a bottle. So what if many G4-era terrarium enthusiasts call them "terraniums"? Their variation on vivarium nomenclature does nothing to diminish the charm of these glassed-in mini-worlds. And particularly high on the charm assessment scale are the creations of the good women of Studio Choo, part of Prairie Collective, whose arrangements of tiny ferns, succulents, and other floral inspire full minutes of unbroken, smart phone-free contemplation.