The preschool period is the time of most intensive growth and development, where acquired skills and habits have an impact on an individual's entire life. One of the habits that significantly influences overall health and should be initiated during the preschool period is engaging in kinesiological activities. Encouraging kinesiological activities among typically developing children is very common, providing them with numerous opportunities to engage in organized physical activities. However, this isn't the case for children with disabilities and developmental difficulties. Involving these children in group kinesiological activities positively impacts the professional and personal development of all individuals interacting with them (typically developing peers, parents, coaches, educators), as well as society as a whole. This thesis describes the Halliwick concept as an example of organized kinesiological activity adapted for children and individuals with disabilities and developmental difficulties, which also allows the participation of typically developing individuals. The research portion of this paper describes a study conducted to examine the impact of the Halliwick concept on preschool-aged children with disabilities and developmental difficulties. The research was carried out through a questionnaire filled out by parents of children attending a group program based on the Halliwick concept at the Natator Swimming Club in Zagreb. The analysis of the results concluded, based on parental assessment, that the Halliwick concept program had positively influenced the social skills, coordination, self-confidence, concentration, and swimming abilities of the children surveyed.