For children to achieve an understanding of science and of the ways of doing science, and for them to be motivated to use these ways in coping with, understanding, and enjoying the physical, biological, and social world around them, it is not enough that they believe that science is practically important. They must also be curious. Curiosity calls attention to interesting, odd, and sometimes important items in the drama that is revealed to us through our senses. Idle or purposeful, curiosity is the motor that interests children in science; it is also the principal motor that energizes and