She will try different sounds lip bubbles and copy the sounds you make.
She will use lots of different sounds to express different emotions; frustrated grunts, squeals and giggles.
She will listen to you carefully when you speak to her, and she will 'talk' back to you using her babbling sounds.
She will probably be putting a vowel and a consonant together as in "muum", or "bubbub".
She might say 'ma-ma-ma' because she can, but she does not know that this sound is a word she can use when she wants her mother. These sounds will be repeated as she works out how to make the noises.