The appearance of new abilities and structures in the child as a result of dynamical interactions involving the brain, body, and society. For example, the emergence of babbling can occur as the coupling of the oscillatory movements of the jaw with those of the vocal cords.
See Babbling, Complex system, Developmental bootstrapping, Developmental (or ontogenetic) time, Diachronic emergence, Dynamical coupling, Dynamic systems theory (development and evolution), Embodiment, Emergence, Epigenetic emergence, Evolutionary emergence