Acer frequently repeats what he hears, this is normal for a 2.75 year old. What I find unusual is that he repeats both sides of a conversation,including changing his voice and inflections to imitate the speaker's voice.
example (currently being repeated ad nauseum)
A. euuhh (said in a tone of minor distress)
A. What's the matter? Use words, tell Mama" (said in a different voice, supposedly mine)
6 years ago