This book, for grades 2-6, is designed to provide students with a highly motivating and unique opportunity to investigate an aquatic habitat. Students set up, observe, study, and reflect upon their own "desktop ponds." Accessible plants and small animals used in these activities include Elodea, Tubifex worms, snails, mosquito larvae, and fish. Detailed instructions and resources for obtaining organisms are included. This guide is designed to convey key biological and environmental concepts such as adaptations, life cycles, food webs, and biological control while beautifully illustrating the dynamic, interactive nature of living organisms. (WRM)