Late childhood is described as a period of calm before the physical changes of adolescence. Girls generally start puberty around two years earlier than boys, with budding breasts as an initial sign. Children gain an average of 7 pounds and 2.5 inches each year, with growth spurts accompanied by increased appetite. Both girls and boys see increases in body fat in preparation for adolescent growth, with girls seeing earlier and greater increases. This stage is also characterized by advancing motor skills and interests in physical activities shared with friends and family.