The Exploratorium is a hands-on science museum in San Francisco. Each "Snack" in this sourcebook tells teachers how to build a classroom version of a particular Exploratorium exhibit using readily available materials. The recipes include instructions, advice, and helpful hints, accompanied by photographs and line drawings. The Snacks can be use as a demonstration, lab, or as an exhibit that students can use for a period of time. They can be built by the teacher or by students. This book contains 107 Snacks, a resource guide, icon index and a general index. (PR)