In this final paper main theme is activities which are used to improve language and speech development of preschool children. Preschool teachers use language games, activities and artefacts in their educational work to encourage developing children's language and speech potential. Each period in the child's development requires a well-thought-out individual approach and adjustment in complexity of the content which is made following previouslylearned contents. In the first part of the paper focus is on the term of the play, which role play have and importance of the play in the child's life as the child through the pla can learn new contents and skills. Numerous authors give different definitions of the play, but they all emphasize content complexity of the play. The play is being studied from different scientific points of view. The terms of the play which are used in different societies are described in detail. The play develops on two levels: the cognitive and social level. In paper it is presented classification of the children's play, then there is classification by author Mirjana Duran (2001) who conducted research on theme children's play and the roles between children in play. Mirjana Šagud (2002) conducted a research regarding the role of a preschool teacher in play. The conditions that are need to be provided to achieve a successful play are described in special chapter. There are different pedagogies which have different approaches to the educational process. Montessori's approach is pedagogy which is described in detail in special chapter.The preschool teacher have an important role in the child's development and important role in the play process. The preschool teacher have an important role in the child's development and important role in the play process. Child gains experience and prepares for social responsibility through its own interactions and communication with adults and peers. Preschool is the place where children's development and preparation for life in a developed society are encouraged. In the second part of this final paper, the emphasis is on language and speech development and it is presented theirs detail classification. In the last part of the final paper are presented specific language activities, language games, methods and artefacts which preschool teachers use to encourage and to influence on children's language and speech development. There are presented examples from educational practice.