This is a timeline which highlights the major physical developments that children ages 8 to 11 go through. Girls and boys go through some different changes at this age, but they also go through some similar changes. Children at this age grow both physically and cognitively. Growth during middle childhood is slower than it was in early childhood. Most of the physical developments during middle childhood involve variations in growth patterns. Some factors which may cause these variations include gender, ethnic background, hormones, genetics, nutrition, or disease.
Secondary characteristics begin to take place in boys and girls. Girls begin to develop breasts and curves. Boys begin to develop broader shoulders and a deeper voice. This is the time that makes it easier to tell boys and girls apart.