'What child has not been fascinated to watch the miraculous metamorphosis of a hungry caterpillar to pupae and then butterfly in a glass jar on the table? This transformation is such an everyday part of our ecological awareness as to be almost child’s play. What was once the cutting-edge technology of scientific observation – the transparent glass isolation chamber, the magnifying lens, and the microscope – has now become household tools for educating children, as if we must recapitulate the lessons of our historical scientific development through our own childhoods.' (Introduction)