When a child is interested, for instance, in poetry, and yet cannot remember it, this shows that it has no concentration; but that will improve by giving the child a greater interest in poetry, and encouraging it to read it more and to recite it, and by showing appreciation of what it does. Very often a guardian is interested in telling a story to a child, but is not interested in hearing that story from the child. But this is a great training if one can do it; if having told a story to the child one asks it to tell the story again after three months, and then sees how its memory works. In this way memory can be developed.