MY 15-month old is in Full Babble Mode. Her words are minimal, but the stream of sound and facial expressions are in full sentences. At day care, she will sit and talk with another toddler, both of them babbling. Do they share an instinctive secret language that all humans know at 15 months and then forget? What are they talking about?

TODDLER 1: I just can't seem to get my mom to pay attention to me...

TODDLER 2: (brief pause) Have you tried biting?