Ah, the blissful day when your young adult finally moves out. You revel in the newfound quiet, reclaim a closet or two and might even consider turning that old bedroom into a hobby space. But just as you’re settling into this next phase, in walks your fully grown child, suitcase in hand, declaring that they’re home again. Welcome to the world of “boomerang kids” -- those delightful offspring who go off into the world, only to return with remarkable accuracy, right back to your front door.