Thumb Sucking

Kennedy has really been sucking her hands a lot lately. She usually sucks on whatever she can get in her mouth but seems she has been sucking her thumb a lot more. It's so funny because in the middle of the night I will hear sucking sounds and I will look in the pack-and-play and she is sucking away on her hand. Sometimes it's the middle two fingers (which is what I did when I was little) or mostly her thumb. She hasn't learned to make a fist while she sucks her thumb so her hand is open across her face.