"It's two o'clock in the morning and you're going to hum your baby back to sleep with . . . "The Simpsons" theme song? Help is here: A Modern Parents' Guide to Nursery Rhymes is the crash course for every new mom or dad who wants to give their child the simple pleasures of traditional nursery rhymes but can't remember a single one past the first line. With its hip approach, witty headnotes, smart packaging, and link to an album of downloadable music,...