DD is almost 7 months, last week I noticed her playing with her hands a lot, looking at them and seeing what they did. Then last night SO and I both saw her wave her hands towards him like she was actually waving. She did it just now at the store too, would look at people and wave her hands. But I'm not sure if she is doing it knowingly or if its just coincidence. I wave At her a lot so I feel like there's a good chance she's mimicking me, lol... But I don't know if she's too little?