Einstein, the eclipse, astrophysics is the inspiration behind this baby sensory block. This block is composed of 6 different fabric panels: Einstein chalkboard in blue and white; grass green; gray faux bois (wood grain); and an aqua herringbone pattern. These blocks are beautiful sensory toys. Babies are drawn to looped ribbons, reaching and pulling and twisting and yes, even gnawing and sucking; a delight for the senses. 3 inch cube.