The National Institute of Health and Medical Research, known as Inserm, has created a series of four children's books aimed at kids aged 8 to 10. These books are designed to teach young readers about the human body, how diseases develop, and how new treatments are created. The series, called The Funny Little Inhabitants of the Human Body, uses stories and games to make learning about the body fun and engaging. The project was developed with the help of the National Research Agency. Each book in the series is written and illustrated by Margot Del Valle. The first book, The Inhabitants of Blood, introduces four characters representing different types of blood cells and proteins. These include Romy, a red blood cell that carries oxygen; Juliette, a platelet that helps stop bleeding; Alban, a white blood cell that fights infections; and Victor, an antibody that helps the immune system identify and remove harmful substances. The second book, The Inhabitants of the Brain, features characters that represent different parts of the nervous system. These include Maël, a sensory neuron that sends signals from the senses to the brain; John, a motor neuron that sends messages from the brain to muscles; Malik, a cell that helps neurons communicate; Léon, a cell involved in emotions; and Nawal, a glial cell that supports and protects neurons. The third book, Our Friends and Enemies, the Microbes, introduces characters that represent different kinds of microbes. These include Minus, a virus that can cause illness; Lillie, a helpful bacterium that aids digestion; and Zazie, a harmful bacterium that can lead to infections. The fourth book, The Inhabitants of Vital Organs, features characters representing cells in key organs such as the liver, kidneys, heart, and lungs. Each character explains how their organ functions to keep the body healthy.