My baby daughter can say many words now. When she is alone and she wants to be carried, she will make some voice. The sound is raised higher and higher. If there is still no one coming, she will cry. That is her ways to attract others' attention. My baby is so smart! Though what she says are only some meaningless voices I am very happy for it.
Today, she uttered a voice which was similar to the voice "mom". I was very delighted to hear that!