There must be a better method than trial and error that harmonizes passion and the life they want when they grow up. What you set your mind to is powerful!
If you are a parent, grandparent, loving aunt or uncle, or family friend of children, it is not too early to introduce them to various professions - especially those professions that are minimally occupied by diverse populations. Sometimes children want to be what they observe. Why not have them observe many different professions, learn more about them, and visualize themselves in those professions - so that they are better equipped to identify where their interest lies. If you are the parent, grandparent, or loving aunt or uncle of a child, what better gift than to give the aspiring leaders in your life the information to open their minds to vast opportunities and the impact that they have on the world.