This interdisciplinary economics project helped first and second graders learn how to conserve energy and save money. The project started because of an announcement by the elementary school principal that, if school utility bills could be lowered, the Board of Education would give the school half the money saved. Students were first introduced to basic economic concepts through the use of games, overhead transparencies, role play situations, and other activities. The second part of the project involved teaching the children about energy, energy sources, and energy conservation through the use of booklets, films, filmstrips, and classroom discussions. Students were also involved in many activities (e.g., they put on a play and wrote energy lyrics to a melody). The third part of the project involved students in energy outreach activities. For example, students made signs for every classroom to remind students and teachers of basic energy rules (e.g., turn out lights), made a videotape, sold recycled products at a cluster fair, and for a culminating effort, launched 700 helium balloons carrying the energy message to surrounding communities. Pre- and posttests and oral checks showed that the project was very successful. Included in the appendix are an economics test and the student handouts. (RM)