0-3 MONTHS
- Smiles at the sound of your voice
- Makes cooing, gurgling sounds
- Turns heads toward direction of sound
- Communicates hunger, fear, discomfort (through crying or facial expression)
3-6 MONTHS
- Begins to respond to the word “no”
- Responsive to changes in your tone of voice and to sounds other than speech
- Babbles in a speech-like way and uses many different sounds, including sounds that begin with p, b, and m