Froebel writes of one of his early plays: “It is really important for the human being, especially as a child, that the essential perceptions of things should be _repeated frequently_ under different forms, and _if possible in a particular order_, so that the child may easily learn to distinguish the essential from the unessential and accidental, and the abiding from the changing. Unnoticed and unrecognized though the phenomena are to the child, yet the impression of them will be certain and firm, and this so much the more when the repetition has been precise and clear.”--_P., p. 88._ Later, speaking of a child’s earliest attempts at walking, he says: “The smallest child who begins to exercise the power of walking, loves to go from place to place--i.e. _he likes to turn about and to change the relationships in which he stands to different objects, and in which they stand to him. Through these changes he seeks self-recognition and self-comprehension, as well as recognition of the different objects which surround him, and recognition of his environment as a whole_.”--_P., p. 243._ Dr. Ward requires still more and says that “the unity of a thing” carries us over to temporal continuity, and this he attributes to “the continuous presentation of such a group as the bodily self, which makes us infer continuity of existence, for presentations which have been presented, removed and re-presented.” We have seen already that Froebel says the child perceives the ball “through departing and returning, as a space-filling object, as a body, just as he perceives himself, his corporeal frame, as a space-filling object, as a body.” And there is also a quaint, but interesting reference to something of this kind in one of the earliest Nursery Songs called “All Gone,” where the mother is distinctly told that she must help her child to realize continuity through change. “How can the child understand what you mean when you say ‘It’s all gone, Baby’? He will not be contented unless you put meaning into it. What he saw just now he sees no longer, what was above is below, what was there is just now vanished. Where, then, has it gone?” And the baby is supposed to be quieted by the mother’s playful tale of the present whereabouts of his bread and milk, a German version of the homely “Down red lane.” Professor Ward’s last point in the intuition of things is “substantiality.” “What is it,” he says, “that has thus a beginning and continues indefinitely?” The answer is that “of all the constituents of things only one is universally present, that of physical solidity, which presents itself according to circumstances, as impenetrability, resistance or weight.… In other words, that which occupies space is the substantial; the other real constituents are but its properties or attributes, the marks or manifestations which lead us to expect its presence.”