This is the first major study of the development of child grammar in a Creole context. The analysis proceeds within the GB framework of generative grammar, and is, in fact, a test of the adequacy of the GB framework for the study of Creole languages. The data also provide a means for evaluating Bickerton's theory, especially his conclusion that the acquisition of radical Creoles takes place with fewer errors than is the case for other languages, given that Creole languages are in harmony with the 'Bioprogram'.