If youve already melted. This is regarded as a language. White English Caucasian Three Month Old Infant Baby Girl Smiling Cooing And Grasping Hands Together In Response To Adult Stock Photo Alamy In terms of language development there are a ton of wonderful milestones to look forward to. . They will start to pay attention to. Typically babies start making cooing sounds around 2 months old but it can. To know when babies will start smiling and how this guide guides you through the. Babies typically begin cooing around. Cooing the precious sound babies make is their first vocal milestone and its sure to bring a smile to any parent. Three six months. They also begin to respond to sounds smile and mimic your facial expressions at this age. Most babies say their first word sometime between 12 and 18 months of age. Does cooing mean a baby is happy. If your baby doesnt start babbling or at least