We are all more or less aware of the role that fairy tales play in the balanced growth of a child. In his or her developmental journey, the fantasy that comes from them can certainly accompany him or her and help him or her to cope better with some of life's most important moments. But why is it so important for the child to listen to or read a fairy tale? In addition to the "relational and empathic moment" that is certainly established in the parent-child dualism and the "moment of pure intimacy" that comes from being one with the book itself, the fairy tale or the fable represents the opportunity for the child to dive into the imaginary and, through the wonder and amazement that comes from it, expand creativity and their cognitive and emotional potential as well as recognize, understand and deal with feelings and emotions that accompany them during their growth. The objective of this contribution is to highlight the primary role played by fairy tales in the emotional development of the child, also through the analysis of some fairy tales present in the literature of childhood and the experimentation carried in the Laboratory of Children's Literature with the students of the CdL in Science of Primary Education.