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The purpose of this study is that through examination and comparison of physique and physical strength of children in kindergarten who do not participate in dance lessons and children who do in their dance institute, I identified the effect of dance lessons on physique and physical strength of children. Futhermore, I tried to describe the benefit of dance lessons in developing physique and physical strength of children. Subjects are girls aged from 4 to 5 who participate in dance class more than three times a week and girls in kindergarten who don't. Measuring physique involves hight and weight whereas Measuring physical strength includes sitting like letter V, vertical jump, upper body flextion, standing on one foot with open eyes. Based on this data the means and standard deviations were produced from the evaluation of each group. To prove the difference between these two groups, 2 sample T-test were performed in each groups. The level of significance is p<0.05. Analysis from these data indicates following; 1. The group participate in dance class appeared to be better than the other group in abdominal muscle endurance (through measuring sitting like letter V). 2. The group participate in dance class appeared to be better than the other group in power.(vertical jump) 3. The group participate in dance class appeared to be better than the other group in flexibility (upper body flextion) 4. The group participate in dance class appeared to be better than the other group in balance (standing on one foot with open eyes)