There's something really nice about the sight of no cars on Park Avenue. During the summer, the city selects a small handful of Saturdays to open up the avenue - from 72nd St down to the Brooklyn Bridge - to cyclists, runners, walkers, and rollerbladers. Today was the first time we took advantage of Summer Streets, and the feeling of being able to spread out across the street was pretty awesome. We took Sophia out in her Peg Perego, and saw plenty of other baby strollers out there, too. I think Summer Streets is a great idea. Traditionally Manhattan is less crowded on weekends in the summer, so it seems that closing down Park Avenue for a few hours doesn't hurt traffic too much. And there's even free bike rentals!