This book is a poem.  As such, it’s hard for me to say exactly what it’s about:  I’ve read it three times, and I’m still not sure how to describe what exactly it’s trying to say, but then, that’s kind of the nature of poems.  The illustrations are soft, and the text is lyrical, and the ideas give the reader things to ponder.  It is a book of simple beauty.  My first hesitation was to wonder whether children are really going to appreciate it, but then I decided I was underestimating kids.  Certainly not all kids are going to love this book, but I want to think some will respond to it.  Definitely a good tool for a poetry unit.