Thirty-nine four and five year old children were instructed to choose between looking at the picture behind one of two windows on each of 20 trials. The picture behind one window was always the same whereas the picture behind the other window changed on each trial. The results indicated that the frequency with which "varying" or novel stimuli were selected for viewing increased as familiarity with the "recurring" stimulus increased. The importance of this finding for the study of stimulus selection and exploratory behavior was discussed.