How old would your child need to be before you'd leave them home alone in the holidays in the following circumstances... The shift including travel time is 12hrs, an elderly neighbour would happily be on call for emergencies, as would a grandparent that's 10 min drive away. Parent leaves at 7am, home by 7pm. Child not likely to get out of bed until after 12md. Very sensible child, not allowed to open the door to anyone or use heat for food (toaster etc) lots of cereals and sandwiches available