Wikipedia

Fröbel's building forms and movement games were forerunners of abstract art as well as a source of inspiration to the Bauhaus movement.[9][10] Many modernist architects were exposed as children to Fröbel's ideas about geometry, including Frank Lloyd Wright, Le Corbusier, and Buckminster Fuller.[10] Wright was given a set of the Froebel blocks at about age nine, and in his autobiography he cited them indirectly in explaining that he learned the geometry of architecture in kindergarten play: For several years I sat at the little kindergarten table-top ruled by lines about four inches apart each way making four-inch squares; and, among other things, played upon these ‘unit-lines’ with the square (cube), the circle (sphere) and the triangle (tetrahedron or tripod)—these were smooth maple-wood blocks. All are in my fingers to this day.[11]: 359 

Wright later wrote, "The virtue of all this lay in the awakening of the child-mind to rhythmic structures in Nature… I soon became susceptible to constructive pattern evolving in everything I saw.