Infants capacity for visual short term memory improves with age. However, results indicating the kinds of changes that occur during infancy, and how memory may be different for qualitatively different stimuli, are incomplete. Twenty 5-month old and twenty-one 8-month old infants were recruited to investigate differences in memory capacity between two age points, as well as two different types of stimuli and two different set sizes. The results suggest that type of stimulus matters in determining VSTM capacity; specifically, infants have greater difficulty holding faces in short term memory than colored shapes. The implications of the findings are discussed.