The aim of this final work was to explore the benefits and possible effects of the beginners synchronised swimming programme on the kinanthropometric features of toddlers and pre-schoolers. Seven different kinanthropometric tests were used in order to prove the positive effects of the synchronised swimming programme, and of practicing sports in general, on these features. The participants of this research were twenty females between the ages of 5 and 6, attending the standard preschool programme, split into two equal-sized groups. The experimental group consisted of ten swimmers of the Synchronised Swimming Club Primorje Acqua Maris, while the control group consisted of ten girls who do not practice a sport. During the trial the experimental group was additionally exposed to the beginners synchronised swimming programme. The measurements of kinanthropometric features of both groups were done at the beginning and at the end of the trial period. In the conducted research the final measurements of the experimental group showed exceptional improvement in comparison to their initial measurements. On the other hand, the final measurements of the control group matched the initial measurements or demonstrated a deterioration of some kinanthropometric features. Thus, the research demonstrated the quality and significant benefits of the beginners synchronised swimming programme on the kinanthropometric features of toddlers and pre-schoolers, as well as the positive effects of physical activity and practice of organised sports from an early age. Educational institutions should implement informative programmes for parents and teachers within the institution. This would allow them to familiarise with up to date research that demonstrated the importance of physical activity for the child’s growth and for their development of intellectual and motor skills, as well as its importance in normal functioning of the muscular and cardiovascular system and the body as a whole.