To examine whether Docosahexaenoic Acid (DHA) and Docosahexaenoic + Eicosapentaenoic Acids (DHA+EPA) supplementation in addition to National Cholesterol Education Program Step I Diet in Hypercholesterolemic Children increases Docosahexaenoic Acid (DHA) plasma levels in the 2 intervention groups versus placebo. Secondary outcome measure: effect of DHA and DHA+EPA supplementation on blood lipid profile