Reaching for any object helps baby’s brain develop hand-eye coordination. And there is one object that even newborns enjoy grasping and that is your finger.
Allow your baby to feel your finger and take hold of it. Reward her after each grasp by saying “good girl” or “you’re so strong.” Encourage her to reach for your finger by gently stroking the inside of her hand then slightly moving your finger away. She will quickly learn to coordinate the feel, reach, and grasp.