By scaffolding, we just mean “building” on your baby’s language. When he says one word, agree with him, but add another word, then another. Keep doing this until you are giving him short phrases to say and he can repeat them after you. Add two syllable words after he masters one syllable words.
When you are reading to her, point to pictures and name the object, then add a descriptive word or a verb to the word. For example “bear…brown bear…brown bear jumps.”
This sequences of teaching your baby new words makes it easier for her to understand.
Check out this video clip of this mom scaffolding language for her son: