In this play, aliens from a distant galaxy visit an Earth site in three time periods, observing people as they deal with the environment. The aliens bring their wisdom and vision of the future to show children of the present what to do to avoid a grim fate. The lessons are suitable for grades 3-6, and include from 18-32 speaking parts plus cues for sound, music, and lighting effects. Suggestions for props, sound, lighting effects, and costumes are included with the dialogue. (CW)