I have daughter. She is about 6 months and every day she is learning. And when she discovers something new she likes to repeat it. Again and again. For example, about a two weeks ago she learned that she has wrists that can move in all sorts of ways. So when she grabs things--her toy, a piece of a paper, three pieces of grass--she holds it up and moves her wrist up and down, left and right, in a circle to great satisfaction. She then proceeds to put the object in her mouth.
About a week ago she learned how to 'happy' scream. It first happened in Target. Mrs. Redhead in Rapid was about 3 aisles over with the little one when I heard, "YEEE!!!" breath "YEEEE!!!!" She had found her voice. And she keeps finding it. Yesterday, Mrs. RiR had a scream off with the little one. I scream, you scream. Again.