Apollo Pharmacy First Aid Kit contains general supplies like bandages, antiseptics, and basic medical items, which are generally safe to keep at home and can be used for children. However, some items in the kit, such as antiseptic solutions, pain relief creams, or medications, may not be suitable for a 3-year-old. It is important to use only age-appropriate items and to consult a paediatrician before administering any medicine or treatment to a young child.