On behalf of Crown Prince Abdullah bin Abdulaziz, Deputy Premier and Commander of the National Guard, Prince Salman bin Abdulaziz, Governor of Riyadh Region, patronized here today a symposium on characteristics and requirements of early childhood. The three-day symposium is organized by Saudi National Childhood Committee of the Ministry of Education. Following the opening of the symposium, Prince Salman expressed happiness for opening the symposium on behalf of the crown prince, hoping the symposium will yield good results.