Frank Lloyd Wright is deservedly prominent in American architectural education. Consequently, Froebel blocks, a type of building block toy fundamental to Wright's youthful development, are widely known to architectural graduates. Little recognized though is that these geometric toys that Friedrich Froebel designed in Germany in the 1830s, were merely a small part of the educational system he invented and called kindergarten. And that in direct, and unprecedented fashion, they were the vehicle that first exposed not only Wright, but the likes of Le Corbusier, Vassily Kandinsky, Piet Mondrian, and everyone at the Bauhaus to the viability of geometric abstraction. Cubism may have been a common thread through modern art and modern architecture, but kindergarten began casting its crystalline spell over Western art years before the Cubists were born.