In 1912, Frank Lloyd Wright designed a school and playhouse for clients Avery and Queene Ferry Coonley, advocates of progressive education especially for programs for young children. Called a playhouse because of its performance stage, which played a central part in the Coonley's program, the building boasted dozens of festive, brightly colored art-glass windows. Wright used balloons, checkerboard patterns representing confetti and an American flag to create a complex, abstract, asymmetrical design reminiscent of a parade. the nonobjective, geometric patterns are considered Wright's greatest achievement in art-glass. The triptych, which originally was installed in the radiator niche of the playhouse, is now in the collection of The Art Institute of Chicago.