By Alfred De Vito and Gerald H. Krockover. How much does a dripping faucet raise one's water bill? Which uses more water, a shower or a bath? How much energy did it take for the Egyptians to build a pyramid? Would a windmill be an efficient energy generator at your school? How would you make your own recycled paper? Hands-on constructivist activities using everyday items challenge students to develop more informed ideas about where energy comes from, how we use it, and how we might use it better.