This practicum report was designed to help child development students differentiate between the preoperational and concrete operational stages of the Piagetian cognitive hierarchy. The 36 on-campus and 63 instructional television students used a Piagetian Game booklet, which is included in the appendix. Using this booklet, students were able to compare their observations and their subjects' responses to a checklist of characteristics typical of preoperational and concrete operational thought. Students used the booklet successfully and were generally enthusiastic about the practicum. A 35-item reference list and five appendices are included. (PCB)