Consider the circumstances: Where will the child be when left alone? How long is the child to be alone?
These same questions should be asked when considering whether a child is old enough to baby-sit. However, when considering a child as an adequate baby sitter, you must evaluate these factors for both the potential baby sitter as well as the needs of the child or children who will be cared for by the baby sitter. A child of 12 might be fine alone for two hours in an afternoon. Yet, the same child may be incapable of responsibly caring for a 5-year-old for that same period of time.