It must be remembered that no time in man's life is so productive of action, both mental and physical, as childhood; but usually it happens that this most important period of the life of man is wasted in play which mostly brings no result. If this activity of mind and body which is exerted in play were used in educating the child without in the least straining its mind or body, it would be of great value in its life. But what we generally find in the world is quite the contrary. People say that early childhood is the time for a child to play. No doubt this is true; but it must be remembered that in every action, work or play, one spends a certain amount of energy; the difference is that work is what one is obliged to do and play what one does for one's pleasure.