Phone call while you are bathing child. Persistent phone caller. When return from walk, notice the front door is open. Child locks self in bathroom by accident. Door locks when you and children go out to play.
Child throws up.
Pet gets hit by car. A single mother is at work. You are sitting for one boy - 3 years old. When you are feeding him supper, he chokes on a peanut butter sandwich. The mother and father are going to the movies, then out for a snack.