To dream of children implies your desire to return to a more innocent time when you were not burdened by problems or troubles of the adult world. You want to enjoy life and be free of responsibilities and obligations. Perhaps there are goals that you regret not being able to achieve. You should allow this child to develop and see if there is some aspect of your life that needs to flourish.
To dream that your own grown children are still very young suggests that you are fearful of them not needing you in their life. You want them to always rely on you as a parent.
To dream that you are watching children that you do not know signifies that you possess some attribute or trait that has yet to be discovered.
To save a child represents your fear of losing some inner aspect of your personality or character.