They like to collect things and to admire their possessions. Sex education is needed and eagerly sought by year-olds. At a more appropriate time, you may again tell the story of reproduction; and eventually, the information will be assimilated and reported correctly. Children at this age do show an increased interest in the products of elimination. Twelves like to debate political and civic issues and plan group projects. The elaborate neurological network that allows for kinesthetic awareness and voluntary control of bowel, bladder and sexual system functions is basically complete within the first five years of life, although all systems remain highly susceptible to psychological vicissitudes in childhood, adolescence and adulthood.