SW, Boy and Girl spent most of the day at the Science Museum, where Boy rededicated himself to a career as a scientist. (Paleontologist, herpetologist, or whatever.) This evening we spent some time making a terrarium for the stretchy rubber lizards and snakes, then he made a blanket-and-pillow structure for his ceramic gecko. (Which ordinarily would belong in the garden, but that's the kind of parents we are. "Can I...?" "Yeah, sure, why not." Carefree, also tired, that's the kind of parents we are.)

"This is the lizard's lair," he told me. "I wish I had a lair," I said; and he said, conspiratorially: "You know what your lair is?" and leaning in to whisper: "Law school."

Yeah.