Down''s syndrome children (28) and normal children (33) were evaluated for patellar tendon reflex, muscle tone and grip strength. All of the subjects were between the ages of 4-17 yr. The standard patellar reflex test was used for 1 measure of muscle tone, and a locally devised muscle palpation test for the 2nd measure of muscle tone. Grip strength was employed as a measure of muscle strength. Down''s syndrome children had a less brisk and more irregular patellar reflex response than normal controls. Overall muscular tone was less in these Down''s syndrome subjects and muscular grip strength was inferior, when compared to normal children. Implications for increased physical education and physical activity are noted for this special population.