Baby smiles when you smile at her. She responds to loud sounds by becoming completely silent, crying, or acting startled. She focuses on very small objects, like raisins. Baby may laugh out loud. She may even squeal.
All babies have their own internal developmental timetable.
If you have concerns about your baby's development, discuss them with her doctor. Hang a brightly colored mobile over baby's bed. Introduce more upbeat, bouncy music during playtime. If baby grows anxious, end the music and soothe her in a calm voice. Watch your baby to see what attracts her and what frightens her.