Babies, without explicit learning, learn the most complicated of languages. What makes babies such little geniuses? Two reasons: 1) the language they hear is, in its own right, a very rich auditory input, full of information and acoustic cues on which babies can grab on and «bootstrap» their way to meaning, syntax and morphology; and 2) the way the parents speak to them, using «babytalk» (infant directed speech - IDS), enhances significantly these acoustic cues that help the baby decode speech. Understanding the exact type of information that an infant’s brain uses when listening to language, how it uses it and what role «we» (the parents and caregivers) play in an infant’s language development are a few of my research interests.