Help your baby understand that she has her own hands and assist her in getting used to how they move by putting a colorful rattle-bracelet on her wrist. (Only use wrist rattles approved for infants.)
Idea from the book "Play & Learn: activities for baby and child" by Dr. Roni Cohen Leiderman and Dr. Wendy Masi available from Amazon:
http://amzn.to/1sZxPEs
You don't have to buy expensive baby wrist rattles. This is a bracelet made by Our Little FECS. I have added a bell to it, so that it will make sound, when Baby FECS moves her hand: