Children cannot enter into binding contracts, are not permitted to drive cars on public roads, join the armed forces or get married. In the U.S., a parent may permit their 17-year-old child to join the armed forces. Various states differ as to what age a minor must be before their parents can permit them to marry. | Children cannot enter into binding contracts, are not permitted to drive cars on public roads, join the armed forces or get married. In the U.S., a parent may permit their 17-year-old child to join the armed forces. Various states differ as to what age a minor must be before their parents can permit them to marry. |