|Stacking of shapes associated with Froebel|
We now proceed to the cylinder, the reconciliation of the two opposites; an object which having qualities possessed by both occupies a middle ground in which each has something in common. Froebel originally took the doll as the intermediate form "uniting in itself the opposites of the sphere and cube," and thus showed that he understood child nature well, for no toy follows the ball with greater certainty than the doll. – Wiggin, Froebel's Gifts, 1895As far as I know, Froebel made little further reference to that which is absolutely obvious, as is shown in the photo below. When arranged in this order, the three basic forms found in nature combine to present the form of man. The point here is obvious. The Froebel gifts were not intended as a means of hammering the children to attention but to awaken the child's own gifts of discovery, for nothing engages one's attention more effectively that to discover something for oneself. It suggests the difference between learning and being taught.
"But now as man both unites the single, which finds its limits in itself, and the manifold, which is constantly developing, and reconciles them within himself as opposites, there results also to the child from both, from sphere and cube outwardly united, the expression of the animate and active, especially as embodied in the doll." — Froebel's Pedagogics
Make, fix and create.