This guide is intended for leaders of children's groups and teachers of lower elementary grades. The book is divided into two parts. The first half contains reports by Cub Scout den leaders. The second part gives the entries of the winning 8-, 9-, and 10-year-old participants. In Part I, there are wide margins in which teachers or leaders can make notes. The final products of the science activities are presented. Part II gives the reproduced written compositions of the children. Explanatory descriptions of the artwork, written by the children, are included. Cub Scout national winners, area winners, and participants are listed in the appendix. (SA)