Here is a beautiful example of children catching the sounds of adult talk without being able to form the words yet. They have the 'music' of the language.
http://www.youtube.com/watch?v=_JmA2ClUvUY
http://www.youtube.com/watch?v=_JmA2ClUvUY
Having taught the 3 Rs to students of all ages, I have a thing or two to share about grammar, reading and writing and mathematics, education, ...