The topic of this final thesis is development of child's speech from age of three to six. In the theoretical part we talk about speech, language development and speech development from the third to the sixth year. We also talk about symptoms of delayed speech, differences between speech of boys and girls and we also talk about first borns and second borns child. We are talking about factors which influence development and enrichment of speech (parents, television, computers, books, games). We are naming games and other activities with which we can influence child's speech. We are also mentioning skills of deepening speech development. The survey was conducted with seventy parents whose children are between ages of three and six and are attending kindergarten. Goal of the research was to find out when child said their first word with meaning, how it pronounces some sounds, do medical and development difficulties exist, do children use computer at home, which programmes they usually watch on television, do their parents read them stories, do parents correct them if their pronunciation is wrong and etc.