This paper presents the development of bilingualism in children of early and preschool age. The environment in which a child grows up plays a very important role in the development of bilingualism. Most children first start learning their parents' mother tongue, and a few years later they are exposed to another language. There is a lot of talk about the issue of bilingualism, that is, when is the best time and whether it is good that children are immediately exposed to bilingualism. Does bilingual communication create chaos in their developing children in their development? Children who learn two languages from the beginning usually know how to mix words. It is often the case that one word exists in one language and not in another. What is the turning point in the adoption of bilingualism, is it the movement to kindergarten or the time when moving to primary school education, does the language of the country in which one resides prevail over the mother tongue? We can say that the language of the country in which one resides is the language that accompanies the child in his lifelong education. What language will he use to convey information about various events related to his house and family, and what in his communication outside the house. Ideally, the child should be able to use both languages to the same extent, as this is the time the child translates outside the family, most often using the language of the country in which he is living. It is a society that most often has a very large impact on the general development of the individual, and in children because it will most often embrace the language that prevails in the society that surrounds it. In fear of rejection and ridicule, children are the ones who will follow the line of least resistance, so they will embrace what will be socially accepted. Educators and teachers have a major role in the development of bilingualism, which will encourage children to master both languages at the same time. Bilingualism used to be associated with poverty. Most of them were minorities who developed their own language, and often these were families who had no status in society. In order to fit into a particular society or be partially accepted, they had to develop bilingualism or learn another language. Over time, this attitude changed, and bilingualism began to emerge among the nobility and the clergy. But we can say that bilingual speakers are more creative and find solutions to various problems faster. Although some children have difficulty developing speech, this may not be due to growing up in a bilingual community. Most often, children growing up in a bilingual environment learn both languages in the same way as they would learn one language. Nowadays, children of bilingual families have a greater opportunity to develop and progress and gain an advantage over their peers because they learn two languages from an early age, which makes them more successful later because they develop communication skills more easily.