Early childhood language development is crucial for forming linguistic skills and communication abilities. Despite the natural progression from initial sounds to complex sentences, some children face developmental language disorders that slow down this process. Such disorders manifest as a delay in linguistic progress relative to the child's age. There are various activities that prevent language lag and encourage language development. In this paper, we will specifically focus on picture books as a powerful tool for stimulating language development in children. Picture books play an educational role in child development. They provide interactive reading, foster imagination and language sensitivity, and enrich vocabulary and grammatical structures. In a child's life, play is a highly important concept for growth and development. Through play, children explore the world around them, develop motor skills, and communicate with their environment. The combination of play and learning is realized through the concept of interactive picture books, where children become active participants in reading. This paper deals with the design of an interactive picture book and its key elements – illustration and typography. It seeks to demonstrate how interactive picture books are indeed a quality instrument for promoting language skills. Special focus is placed on the use of spatial prepositions (in, on, under, between, next to, above), which often pose a challenge for children. In collaboration with a speech therapist, we have developed an interactive picture book that encourages the use of spatial prepositions. Therefore, this picture book will be useful for parents, speech therapists, and of course children, as a tool that will facilitate and enhance work with children in the context of speech-language development.