Motor skill development sets the basis for children’s movements and overall physical activity. Fundamental motor skills are best learned before the school-age. Good motor skills in childhood predict more active lifestyle later in youth. Motor skills are also associated with cognitive skills, health determinants and psychological wellbeing of children. At the moment we lack large scale children’s motor skill assessment surveys in Finland, and therefore the purpose of this study was to describe the motor skill level of 3–10-year-old children in 2015. The participants of the study were 374 children (191 girls and 183 boys; mean age 6,78; sd 1,98). Data were collected from six primary schools and eight day care centers in Middle-Finland using a new Test of Gross Motor Development, 3rd version (TGMD-3). Motor skills were assessed afterwards from the videos by two trained assistants (physical education teachers) without any distractions. This was assumed to increase validity and reliability of the results. Means and standard deviations were calculated to describe the sample. KruskalWallis -test and Mann-Whitney U -test were used to calculate differences within ages and between sexes. The results revealed that older children achieved higher TGMD total skill scores than younger children, but the individual items’ mastery was very difficult for all children. In locomotor skills there were no gender differences except that 5-year-old girls were better in skip than boys. In ball skills boys were statistically significantly better than girls in every age category and every skill. Based on the test results teachers have an opportunity to take into account individual differences between children, and plan programs for each child in a way that best supports his/her development both in early education and at school.