This is a good jumping off point for teaching children about conservation. The illustrations are enough to keep small children interested through the wordy nature of some of the pages, while those words are enough to keep older children on topic and learning. While this book does cover a lot of time in very few pages, there’s enough information provided to spark questions and further research if the child in question is old enough and interested enough to pursue it. Basically this is a jumping off point, and it’ll work well for that purpose!