To nourish the love of language-its music and its surprise-Harvard professor Robert Kegan appeals to all a young child's appetites- the fascination with animals, the preoccupation with food, the delight in the incongruous. Kegan's clever text and Walsh's evocative watercolors introduce the young child to the classic form of The Joke-a set up ("My palominos...) and a punchline ("...love jalapenos "). They can't resist "telling it" over and over. My...