Having intensive interests is one of main characteristics of autistic individuals and it represents one of criteriums of making diagnosis of autism spectrum disorder (ASD). However, intensive interests can have different influences in different aspects of life of autistic individuals about witch more and more autistic self-advocates report about. Research review shows that there are benefits of intensive interests about which often report autistic individuals and experts when describing use of different methods and intervention approaches. But there is other line of research which reports about challenges, deficits connected to intensive interests or that arises from intensive interests and which participants are mostly parents of autistic individuals and experts. The aim of this research was to investigate the role of intense interests in the development of play in autistic children and in their social communication. A protocol consisting of two parts was created for the purposes of the research, the first part includes generic toys, and the second part includes toys related to the intense interests of the individual participant. A total of seven autistic children between the ages of 4 and 8 with a confirmed diagnosis of an autism spectrum disorder participated in the research and the research itself was conducted at the Center for Rehabilitation at the Faculty of Education and Rehabilitation Sciences. The obtained results are very diverse, which is why it is not possible to draw general conclusions about the role of intense interests. However, this research offers insight into the behaviors of a heterogeneous group of autistic children when they are in an environment enriched with toys related to their intense interests. Some children have shown improvements in the intensity and quality of social communication, while others seem to withdraw into independent play. In addition, it was shown that there are no differences in the type of play with regard to the enrichment of the environment with toys related to the intense interests of the child.