It is very, very difficult to determine the moment when the child ceases to be small, when you can tell himself with a clear conscience: “That's it, you are now an adult, independent and responsible person - yourself a person.” There is a legal border - since the age of eighteen, a Russian citizen is already an adult, no longer a child. But, for example, in Japan, adulthood is recognized only after twenty, and in some states of the United States - from twenty -one years.