Mo Willems and Jon Muth both delighted me and saddened me in their bittersweet story city dog, country frog (Hyperion Books for Children, 2010). It’s not a retelling of City Mouse, Country Mouse. It is a sweet story of friendship over time (in this case the passing of seasons in a year) and of loss and renewal. I can’t give it away. You should read it, but it is short and simple in text, delightful in illustrations, and profound in its message. It is useful for talking about seasons, friendships, loss, and life cycles. It is not just for kids; I’ve read it over and over.
But if you want to share it with kids, I’ve written a lesson plan for 1st grade, which could be used for kindergarteners also.