The aim of the research was to find a valid instrument that measures the agility of children in lower primary school that is also appropriate for their age and to examine its metric characteristics. The research involved 154 primary school students from the 1st to the 4th grade. Figure of eight with ducking (MAGOSS) is the name of the test taken for the research. Agility was tested using three tests in each of the first four grades of primary school. The distance between the stands the students had to run around was 4 meters. They ran in the shape of an imaginary eight lying on the floor and had to bend under the elastic band. The difference between these three tests was the height of the elastic band. In the first test, the height of the set elastic band was the average height of the class, in the second it was 10cm higher than the average class height, and in the third test, it was 10cm higher than in the second measurement. The test ended when the student completed the eight around the stands twice and crossed the finish line. The collected data was analyzed using descriptive statistics and factor analysis. It was determined that the tests satisfy the metric characteristics and the comparison of these tests as well as their results that were done in every grade in lower primary school are presented here.