This publication contains descriptions of space science activities that can be conducted with simple equipment. There are activities suitable for both elementary and secondary school children. Activities are placed under the headings: Astronomy, Atmosphere, Universal Gravitation, Aerodynamics, Guidance and Propulsion, Tracking and Communications, Thermal Conditions, Radiation, Analysis of Extraterrestrial Materials, Extraterrestrial Life, Man's Vital Functions in Space, Life Support Systems, and Physiological and Psychological Aspects of Space Flight. Historical and background information as well as illustrative diagrams accompany the suggested activities. (BR)