I love, love, love this book. It was a fun and cute way Dr. Suess had of telling children to save the planet because if they don't it won't be around long if not, also that things don't change unless we step in. We can't rely on someone else to do it. This is great to use for earth day. The students could write about a way they could "save the planet" and make it better. Then as a class, we could all plant one plant together and encourage students to take it home and replant at home. It's a fun way to teach earth day using literacy and science all in one lesson! Intended for 2nd-4th grade.