In this activity, students experiment and observe the similarities and differences between human-made objects and nature in small groups. Students compare the function and structure of hollow bones with drinking straws, bird beaks and tool pliers, and bat wings and airplane wings. A classroom discussion can be held to discuss similarities and…

Describes an attempt to study and map the development of children's conceptions of materials. Interviews with preschool, first-grade, fourth-grade, and seventh-grade students revealed a dramatic improvement during the years studied in children's abilities to talk and think about materials. (ML)