★★★★ Bubbles drifted west on 68th Street in the sunshine. Wheeled conveyances were everywhere: scooters, bicycles, strollers, a wheeled walker. The two-year-old weaved upstream on his scooter through an oncoming line of them. He rolled expectantly up to the fence of the playground, missing the gate, looking over his shoulder at a pony-sized Parks Department garbage truck. Two games of frisbee were going on in the open schoolyard, and a boy in an Eli Manning jersey was place-kicking a football off a tee into the fence. There was humidity on the air, but still it was cool. After the playground and a long, sunny uphill, hot vapor was rising through the vent holes in the crash helmet. He woke from a nap with his head drenched in sweat, the pillow puddled with it. Down the river, in a bleary haze, a cruise ship was slowly heading off. Toward the day’s end, the humidity was gone, the sky cloudless, the air near crispness. It was a little chilly for shorts, though it would have been ludicrous to call that discomfort. The sun was still warm on the nape of the neck, even on the rebound from windows on the far side of Columbus and Broadway. Ugly steel balcony railings looked like smoked glass. Groups had formed discussion circles on the edge of the artificial grove at Lincoln Center; one participant, in a surfeit of abandon, was stretched out prone on the hard pavement. The western sky at dinnertime had one swath of tiny clouds in it, strewn like barely cracked peppercorns. The sun had declined enough now that the two-year-old could no longer object to it shining in his face at the table, though if he fidgeted far enough back in his chair, he could play with his silhouette and complain or marvel that it had no eyes.