Perpetual calendar from the Museum of Modern Art (MoMA) product collection. Architects John Bennett and Gustavo Bonevardi designed the compellingly tactile cubes, each made of different natural, synthetic, or composite material. Size of cubes varies slightly, due to the unique nature of each material used. Features: Perpetual calendar from the Museum of Modern Art (MoMA) product collection. by John Bennett and Gustavo Bonevardi, 2010. The eight cubes in this collection, each made of a different natural, synthetic, or composite material, can be combined to create a large cube or arranged individually as sculptural building blocks Architects John Bennett and Gustavo Bonevardi designed the compellingly tactile set to encourage creative exploration of its forms and materials Size of cubes varies slightly due to the unique nature of each material used.-