I Have 2 months little baby and when she looked at her hands or objects near to her face she cross her eyes?

Totally normal when they are first beginning to focus on objects. My son just recently stopped doing that and the doc said it eventually goes away. I think he stopped doing it shortly after he turned 3 months. If it persists beyond 3 1/2 to 4 months, ask your doctor for advice but right now, it's normal! Best wishes!