This paper describes the advantages of foreign language learning in children, with emphasis on early and pre-school age. An overview of the many benefits of learning a foreign language at an early age is given, and in particular, the biological factor, i.e. the critical period, which is the subject of numerous studies, is highlighted. The reasons for which children have the ability to speak with the accent of the native speaker are given. Besides the stated advantages described in the work, differences between learning a foreign language at school age and an adult age and at early and pre-school age are presented. Also, the development of language and speech in general is presented, including mother tongue, with theories and research relevant for the research of a foreign language. At the very end, an insight into the importance of the kindergarten as an educational institution is given, which greatly contributes to early foreign language learning, given the fact that children spend a lot of time there. However, in order to achieve that, the kindergarten must show some of the key items that would enable it, which is all elaborated in detail in the paper itself.