<qa>  What is the name of the questionaire?The purpose of this research study is to see if hydroxyurea, a medication given to many children with the most common type of sickle cell, those who are homozygous for the sickle mutation HbSS, helps children who have HbSC. The investigators will see if it helps by giving a questionaire when the medication is started, and then every two months at a clinic visit. The questionaire, called the Pediatric Quality of Life Inventory PedsQLTM Sickle Cell Disease Module version 3.0, measures quality of life. The investigators will also see how hydroxyurea changes laboratory test numbers, and blood thickness. 