A comprehensive preventative and diagnostic laboratory package for children, focusing on assessing blood components and nutritional status. It includes a complete blood count (CBC), which evaluates red blood cells (to detect anemia), white blood cells (to identify infections or allergies), and platelets. It also includes measuring iron stores (ferritin) to diagnose iron-deficiency anemia, and measuring calcium and vitamin D (25-hydroxy) levels, which are vital for bone health, growth, and many other essential bodily functions in the child.