Babies babble in sign language.
The findings support the idea that babies are sensitive to rhythmic language patterns and that this sensitivity is key to launching the process of language acquisition. Vocal babbling, in other words, is not a mindless opening and closing of the mouth and jaw, but a precursor of language.
Benjamin & Sarah's Babyblog is a collection of notes on our children's development and experiences as well as occassional links to information on the Web of personal interest as a parent.