This set of 35 cards is designed to aid children in learning their sounds. This set of cards is optional if you are using the 4 x 5 picture flash cards.  Each card shows a phonetic sound and a picture of an object whose beginning sound corresponds with the phonetic sound. Cards are used with the Learning to Read LightUnits. Unlike the smaller Letter Flash Cards, this size is intended to hang on the wall, and does not include the letter rhymes on the back of the cards.