Baby laughs out loud. He squeals when he's happy. Baby smiles spontaneously. He can focus on very small objects. Baby turns toward the sound of a familiar voice.
All babies have their own internal developmental timetable.
If you have concerns about your baby's development discuss them with his doctor. Because your baby's nervous system is maturing as well, his internal clock is becoming better regulated. You'll also notice less crying. When baby cries One of the toughest decisions you may face will be about crying. Most experts recommend soothing those cries as soon as possible at least during your baby's first few months.