Early childhood follows the infancy stage and begins with toddlerhood when the child begins speaking or taking steps independently. While toddlerhood ends around age three when the child becomes less dependent on parental assistance for basic needs, early childhood continues approximately through years seven or eight. According to the National Association for the Education of Young Children, early childhood spans the human life from birth to age eight. At this stage children are learning through observing, experimenting and communicating with others. Adults supervise and support the development process of the child, which then will lead to the child's autonomy. Also during this stage, a strong emotional bond is created between the child and the care providers.
Middle childhood begins at around age seven or eight, approximating primary school age and ends around puberty, which typically marks the beginning of adolescence. In this period, children are attending school, thus developing socially and mentally. They are at a stage where they make new friends and gain new skills, which will enable them to become more independent and enhance their individuality.
Adolescence is usually determined by the onset of puberty. However, puberty may also begin in preadolescents. The onset of adolescence brings various physical, psychological and behavioural changes in the child. The end of adolescence and the beginning of adulthood varies by country and by function, and even within a single nation-state or culture there may be different ages at which an individual is considered to be (chronologically and the legally) mature enough to be entrusted by society with certain tasks.