It helps to develop communication as well as work on syllables. The symbols allow the person to identify the image and associate it with the first syllable to which the image refers! The set includes an A4 sheet with the diagram, the complete alphabet, the syllables made with each consonant and each vowel and a symbol for each syllable. Everything with velcro to use as many times as you want! Basic and usual symbols of everyday life. Easy to handle and fun to learn!