Parents.com uses the American Academy of Pediatrics' list of developmental milestones to create this great visual list of milestones you can expect of your four to seven months old and activities to encourage ongoing development.
Your Growing Child: Infants 4-7 months
Your baby will begin learning to comfort himself and to stay calm after waking or when going to sleep. If your baby was colicky, he should begin to grow out of this phase and unexplained crying is likely to occur less frequently.
By now, your baby is able to return the loving attention you are giving her. Babies four to seven months old love to engage with the people around them and will continue to show that they are interested in you by smiling, babbling, kicking, and waving their arms. Your baby especially loves the sound of your voice, but she is also beginning to recognize others voices and sounds around her. Of course, you are still busier than ever keeping up with your little one’s needs, but the rewards of parenting and seeing how your baby interacts with the world are starting to show.
Your baby will begin learning to comfort himself and to stay calm after waking or when going to sleep. If your baby was colicky, he should begin to grow out of this phase and unexplainable crying is likely to occur less frequently. Many babies are able to sit without support, although for the first couple of weeks you'll need to stay close by to prevent him from nose-diving out of this precarious new position.
Some babies at this age develop what is called “stranger anxiety.” This is when your infant shows signs of distress when they do not recognize a person near them or their parents are out of the room. This anxiety is not permanent and usually fades over time.
Please check out the resources below for more information on your baby's develoment.