Walter Was Worried by Laura Vaccaro Seeger
A colleague gave me this clever book as a back-to-school gift. On the first page the reader is greeted by the title sequence.  Opposite the text is a portrait of a very worried Walter.  But wait!  The very letters that spell worried form his facial features as well as his expression!  Gradually a simple story unfolds as other characters are introduced, and the sky grows dark, the fog rolls in, lightning strikes, and thunder shakes the trees.  Later the feelings CHANGE and pleasant feelings replace the unpleasant ones.  This book could easily be used in the lower grades for a lesson, with a group, or in an individual session.