Symbols in the Souns early literacy program are specifically chosen and sequenced for contrast in sound and shape, as well as ease of articulation for young children. The non-hazardous nylon symbols are vanilla white, as smooth as satin, and dishwasher safe. Each letter has Braille strategically placed on the front surface. Order Souns materials for a child in your family, a preschool, or for a baby gift. Children love to hold and explore them. What the hand experiences, the mind remembers.