A fairy tale for kids 3—6 years old.
This age is the best for introducing the child to his feelings. By teaching him to understand himself and his feelings, to talk about them, and later to manage them, you give him a chance to not «hide» problems inside and not to turn them into a source of chronic trauma.
There are games and exercises in the book. They will give you ideas and guidance for experiments and explorations while developing your emotion recognition skills.

Alice the Cat and the World of Emotions