NBL first book is for all kids, but focuses on 8 to 12 year olds. It is simply written so young kids can understand it, and is written to be an introduction to basic nature. The book tries to create excitement about nature and surprise kids with its complexity. Each nature topic (water, wood, earth, air and animals) have some common sections:
Why love nature?
What can you do to help?
What are the main threats to ….?
Obviously Nature tries to link the 5 topics together by showing how air, earth, water, animals and wood are link together.