If you've been looking for a cheerful, cheeky sendup of the preschool universe for the ultra-rich on Manhattan's Upper East Side, look no further The Sparrow School, an elite institution for three- to six-year-olds, has just hired an assistant headmaster whose task is to propel the school from a B- ranking into the stratosphere of AA+. The assistant head's name is Ralph Pilipanko, but he likes to be called Rafe, in the British fashion, like the movie...