The Communication and Symbolic Behavior Scales Developmental Profile (CSBS DP) is an easy-to-use, norm-referenced screening and evaluation tool that helps determine the communicative competence (use of eye gaze, gestures, sounds, words, understanding, and play) of children with a functional communication age between 6 months and 24 months (chronological age from about 6 months to 6 years). The CSBS DP Complete Kit, First Normed Edition (Test Kit Toy Kit) comprises: CSBS DP Manual, First Normed Edition (with norming tables); 25 1-page CSBS DP Infant-Toddler Checklists; 25 4-page CSBS DP Caregiver Questionnaires; 25 Caregiver Rating Perception forms; the CSBS DP Behavior Sample (including 25 1-page double-sided copies of the CSBS DP Worksheet for Rating Behaviors, and the Sampling and Scoring Videos; and the CSBS Toy Kit and materials for test administration.