The paper seeks to present the results of research on how to spend free time of preschool children before and during the first phase of COVID-19 virus when, in order to prevent the spread of the virus, in March, April and May 2020, strict health protection measures for health. The aim of the research is to gain insight into the ways of spending free time of preschool children before and during the first phase of the COVID-19 virus, to examine the extent to which their everyday life has changed and how children have accepted these changes. The research was conducted by surveying 1121 parents of preschool children in the whole Croatia. The obtained results show that in relation to spending free time before the virus, during the first phase of COVID-19 virus, the way of spending free time of preschool children changed. Thus, during the first phase of the COVID-19 virus, preschool children most often, and for a longer period of time, spent their free time using the media, primarily watching television, in free play and playing board games with family, and spent less time playing outdoors and in sports activities and mobile games. In joint leisure activities, children and parents spent most of their free time in recreational and outdoor sports activities, outdoor games and playing various games at home during the emergency situation caused by COVID. Although just over half (56,9%) of parents believe that the new situation caused by the COVID-19 virus did not affect their child’s development, 43,1% parents believe that it had a negative effect on their child, especially on his socio-emotional level.