The topic of this paper is stimulating speech development in nursery age children with the aid of picture books. A picture book is a child's first book and plays an important role in their life. By reading a picture book, we influence the child's cognitive, social, and emotional development. Consequently, it is necessary to pay attention to its design. The first part of the paper discusses the developmental characteristics of children of nursery age. The second part of the paper elaborateson the theoretical aspects of picture books; that is, it describes the history of picture books both in the world and in Croatia, and it states the most important authors. The fourth part discusses the type, role, and function of a picture book and the difference between a picture book and an illustrated book. The fifth chapter deals with the illustrations of the picture books that were part of the project. The sixth chapter examines the role of picture books in the educational system through topics such as: how to choose a quality picture book, what is the role of parents and educators in reading picture books, and what is a dialogical reading of a picture book. The next, seventh chapter, explains what is a stimulating language and communication environment. The eighth chapter of the paper describes an interactive didactic picture book. And the last part of the paper describes a project called "Pictures on the Road". Each child had picture books with them for a week, which they read and paged through together with their parents. At the end, the parent wrote a review on what those days of joint reading looked like. The picture books were ageappropriate tailored to suit the children, since the daycare group was a mixed one. Finally, my colleague and I conducted some activities within the group.