My older son, Jack, is in that sweet spot between school and camp. Today, we took a field trip to the east side of Manhattan to check out . . . a world-class museum ? um, no. a beautiful garden ? nope. Those are absolutely places to see, if ever you decide to visit the east side of Manhattan. But we went for tacos and snow cones. In the mornings, I like to sit next to my kitchen window, drink coffee, listen to WNYC (Yes, Ira Glass, I am a member ), and look at the newspaper. This is pretty much right on top of Broadway traffic, so it isn't all that peaceful, but it makes me happy. This morning, I saw this article about shave ice. I called Jack over to read it, because I had just recently confessed to him that, should all my other work-related plans fall by the wayside, I have a back-up: An ice-cream truck. (My truck will have special slushy-ice-and-frozen-custard concoctions that people will line up for blocks to eat. No college-tuition worries here!) One of the spots featured in...