Little Gia understands perfectly Saint-Exupéry's phrase: "what is essential is invisible to the eye." since she has a cochlear implant. This is not an obstacle for her to enjoy even the most familiar sounds, like the sound of the wind or the song of the little birds. She shares her experience with Atman, a boy who wears glasses and loves to read. They have a beautiful friendship that shows how little details build trust and reminds us to value those moments which make us who we truly are. This book's objective is to explain what a cochlear implant is and how it works and highlights that looks do not matter. It also talks about the love of one's neighbor, animals, and nature, as well as the importance of an invention, in this case, the cochlear implant, that has changed so many lives. Kids have the virtue of thinking big. If someone has something to teach us in the world, it is them, with their vulnerability and eagerness to know it all; that is why this story is told by kids for kids. In these pages, Gisel Moussali reminds us that what matters is not what we take from this world, but what we leave behind.