This study investigated the relations between toddlers' degree of attachment to their mothers and their development of an attachment to a security blanket. Seventy-four 18-month-olds were separated from their mothers three times; the third time the toddlers were left for 5 minutes in an unfamiliar playroom with their blanket and with a stranger. The children's response to their blankets, the amount of time they opted to stay in the playroom, and mothers' ratings of the children's attachment to their blankets were used to determine children's security of maternal attachment and level of attachment to a security blanket. Results showed no correlations between attachment to mother and the development of an attachment to a blanket. However, results did show a correlation between the time spent with the blanket in strange surroundings and the child's degrees of attachment to the mother and to the blanket. Blanket-attached, mother-avoidant children spent the most time with the blanket; blanket-indifferent, mother-attached children spent the least amount of time with blankets. The study indicated that attachments to blankets and to mothers originate independently. It is proposed that children use their attachment to blankets differently depending on the level of their attachment to their mothers. (ME)