This packet includes a leader's guide, a quick reference guide to aquatic invertebrates, a checklist of common aquatic invertebrates, and activity sheets. The leader's guide includes four sections on background information and seven activities. Background sections include: Understanding Aquatic Insects; Growing Up: Aquatic Insect Forms; Adapting to Life Underwater; and Profiles of Common Aquatic Invertebrates. Activities include: The Aquatic Safari; Making an Aquatic Insect Collection; Presto, Change-o; Create a Critter; The Waterwatchers' Worry; Word Jumble; and Weaving the Web. Appendices contain directions for building sampling equipment and a list of resources. (JRH)