This document provides a lesson plan about materials that are naturally occurring versus man-made. Students are asked to imagine being stranded on a deserted island and create a tool using natural materials like sticks, stones, grass and pinecones. They are then asked questions about materials that do not exist in nature and how science and technology have led to the development of man-made materials like plastic and concrete. The purpose is to help students understand the difference between materials found in nature versus those that require human invention and production.