4th month milestones
Your baby´s crying in the night will decrease and she will let you sleep longer in the night. She will start laughing and you will enjoy her pleasant giggling reactions on tickling or peek-a-boo. Her babbling will improve and can sound louder.
She might differentiate between bright colours somewhat. She can mimic you better and recognise sounds and movements more easily and her eyes follow the direction of sound or movements.
She may start rolling from tummy to her back and pushing on her elbows. She may start bringing her hands to her mouth and feel the object and even teething. She might try to reach, grab and drool on objects / toys she gets in her hand.