In this paper, we introduce an interactive robot/toy for babies, whose name is Buddy. As Buddy is a product for babies, its exterior is covered with combination of soft silicone and cotton for safety as well as ease physical interaction such as hugging with babies. Buddy is featured with its growing function, to accomplish true and deep interaction with babies. We designed Buddy to grow both physically and intellectually with babies, so that the babies can regard Buddy as their family or friendly peers. In addition, as Buddy will always be with babies, Buddy will act as a bodyguard as well as a keeper of valuable moments. We expect that Buddy will be a solution for issues associated with lonely babies resulted from social problems such as low fertility rate.