This is a cute little story that I'm positive that your kindergartens will love! With this book I would go with a writing lesson. I would tell the students to think of what kind of treasure they would have if they were pirates. I would tell them to tell what is in their treasure box then draw a picture. While they were working I could ask some comprehension questions like, "Where did they bury the treasure?" and "What did the pirates not do in this book?"