Good poetry for children is rare. Few collections, few single poems in fact, survive beyond a few years of popularity. There are exceptions — the poetry and verse of Walter de la Mare, Lewis Carroll, and Edward Lear come to mind. Still rarer is successful children's poetry by a poet known equally for other work, such as Christina Rossetti.These verses — deceptively simple, light, often like a nursery rhyme in character — consider such topics as childhood...