A picture book is the first form of literature a child encounters. Indeed, a child is able to discover the world, express emotions, develop speech, enlarger its vocabulary, and satisfy its need for something new by engaging with it. Picture books open many topics which are not limited only to pleasant experiences but rather to the whole spectrum of experience since they illustrate life fully. Problem picture books serve this purpose and they have no taboo topics. This thesis aims to analyze physical differences as 'otherness' in children's picture books. The 'otherness' manifests through characters who are stigmatized and excluded due to a particular difference in contrast with normative social values. The analyzed picture books show how the category of 'otherness' applies not only to human characters but also to animals, various geometrical forms, parts of the body, and unusual beings from imaginary planets. On selected corpus we can conclude that the fear is noticed and misunderstanding of different characters, but they tend to accept them, so the children in these picture books learn about tolerance and acceptance of others who are different. One can also learn about the importance of friendship, helping others, and the idea that every member of society is unique, important, and should be treated with equal rights.