That we must take care of the environment, today nobody doubts it. Just look at the disaster that nature offers us lately. Now, the environment is not going to be taken care of because a politician or a curriculum says so. We will take care of the environment if the citizens commit ourselves to it.We know that the child at birth ignores the rules that regulate, or should, society. You have to teach him everything and you have to do it at the moment he begins to form his personality, and not later because he can, and usually is, late. If a child is taught to recycle from early childhood, he will continue to do so for the rest of his life.On the other hand, teachers are required to do EVERYTHING, but we also know that they are not given the precise tools to do so. That is why this book, which is already in its fourth edition in Spanish. So that the teacher has tools that allow him, in a very playful way with his children, to educate them to take care of nature, to educate them in getting a better world.