The children's book "C'era una volta..." from Edition Temmen offers young readers an engaging introduction to important environmental issues. The content is scientifically grounded but written in an understandable language that allows children to grasp complex topics. The combination of informative texts and numerous images enhances understanding and stimulates the imagination. The sturdy hardcover ensures robust and long-lasting use, ideal for small hands. Written by authors Dharma Reyes Macaya, Hadar Elyashiv, and Gema Martínez Méndez, the book was published in 2022. It is a valuable resource that not only imparts knowledge but also raises awareness of ecological issues and encourages children to think about their environment.