Packed in sets of 20 and are available in English and Spanish. This CASLLS is best used with children who have started speaking in single words. It monitors the emergence of a full range of semantic intentions through 2 – 3 word combinations. It tracks behaviors typical for development at 12 – 24 months. Behaviors/language monitored on this CASLLS include: cognition/play, listening, social interaction, linguistic meaning, expressive syntax, receptive first words and expressive first words.