The Dawn of History. A. Keary. 44-47.
Hints to Teachers. E. Marwedel. 5, 6.
Froebel's Letters. Tr. by Michaelis and Moore. 83-85, 98, 101-03, 107, 176, 220.
Conscious Motherhood. E. Marwedel. 106, 107, 118, 119, 153, 162-64, 170-74, 256-62, 291-96.
FROEBEL'S SECOND GIFT
"From the ball as a symbol of unity, we pass over in a consecutive manner to the manifoldness of form in the cube."
"The child has an intimation in the cube of the unity which lies at the foundation of all manifoldness, and from which the latter proceeds."
Friedrich Froebel.