This master thesis aims to illustrate the potential that problem picture books have in the classroom with a focus on developing unity and tolerance. The topics of the paper have been treated in such a way that the meaning of the term picture book and its historical context, its types and functions, are first presented. Since the picture book is the child's first book, it is an important part of the child's life because it introduces him to the world of literature and through it the child discovers the world, the knowledge, the learning, and the imagination. Picture books will create space for children to reflect, dialogue, and interpret, and their role is both educational and developmental. Also, through it, children will gain knowledge about emotions and get answers to various questions. There are several types of picture books, and problem picture books are such picture books that deal with different problems that children face. They teach them how to identify possible dangers and how to set themselves toward them. Problem picture books serve not only children and parents but also teachers who will find solutions through them to the many challenges that may arise among their students. Through problem picture books, students will see that they are not alone in difficult situations. With their illustrations and text, they encourage tolerance, respect for each other, and accepting differences. In fostering tolerance and respect for diversity, an important role is played by the teacher and the school pedagogue who will assist the teacher in interpreting problem picture books and carrying out the following activities. After analysing problem picture books, teachers should also organize various activities with students that will also help solve the current problems in children's lives.