Encourage his talking by talking to baby and pausing to give him a chance to answer . Even if he smiles or waves his arms instead of making a sound, he s learning that conversation is a two-way street. He probably says them over and over as if he s practicing. Soon he ll make consonant sounds, too. There is another kind of baby talk that is useful.
Researchers call it Motherese.
This gives baby extra chances to hear the sounds. Try saying dog out loud. Now say doggie. Even very young children talk to babies in high-pitched voices and use Motherese. Researchers have found that people all over the world speak to babies this way.