Supplementing calcium is crucial for the physical development and bone strength of a 5-year-old child. In cases without severe calcium deficiency, calcium can be supplemented through food. If the deficiency is more serious, medication supplementation should be considered first. The Balilai Children’s Four-Vitamin Calcium Tablets are a suitable calcium supplement for children, containing 10.2 mg of Vitamin B1, 0.1 mg of Vitamin B2, 2.5 mg of Vitamin C, 70 IU of Vitamin D, and 150 mg of calcium gluconate (equivalent to 13.5 mg of calcium). These ingredients help promote the formation of new bone. It is recommended to take this under the guidance of a clinical doctor, either by mouth or after chewing.