This work analyzes linguistic descriptions based on feelings (happiness, sadness, anger, fear) of children of kindergarten age. First of all, it explains theories of language acquisition (behavioral, nativist, cognitive and social) and the pre-linguistic phase (prelinguistic or pre-verbal), which starts with the first cry of the newborn and lasts about one year. Then the language phase (linguistic or verbal), which for most children begins around the first year of life. The importance of playing in kindergarten for the development of language skills is also discussed in this work. In order to develop them, children need to be physically active and engage in activities that require the work of hands. The work covers also about the importance of reading for children at an early age and preschool age, because this way they spontaneously learn new words and learn to listen carefully, pay attention and keeping concentration. Furthermore, each feeling (happiness, sadness, anger, fear) was described separately on the basis of which the research was conducted. The last part of the work presents a study conducted at the Kindergarten Sunčev sjaj - Nazaret (a branch of Kindergarten in Zagreb) and the Kindergarten Bedekovčina. Reading four picture books based on feelings encouraged children to talk about them more easily and without difficulty. It examined the words which describe the underlying feelings and which they list as objects in the description.