Sound play is important to child language development in that it contributes to the phonetic substrate, it is a factor in phonological development, and it is something to be learned as part of the socially acceptable use of language. Sound play progresses in three stages: (1) babbling, in which a gradual acquisition of phonetic units is built up…

A discussion of word acquisition rates and strategies is based upon a 6-month case study of an Estonian-speaking child who gradually and systematically relaxed phonotactic constraints to allow greater complexity in word production. In addition to the cognitive tools of assimilation and accomodation as described by Piaget, the child used a further…