The intent of this booklet is to provide practitioners and parents with (1) research findings related to three aspects of development important to all children--problem solving abilities, language development, and self-concept; (2) interpretations of these findings; and (3) activities for children appropriate to these findings. Bibliographies of the research studies used for each of the three developmental aspects are included and an attempt is made at the end of the booklet to answer 10 questions commonly asked by practitioners and parents working with children. (Author/MP)