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Michael Bluejay's Saving Electricity site reveals that powering a desktop PC with a 17-inch LCD, 8 hours a day, 20 days a month costs about $35 a year. It also claims that computers and electronics consume nearly 10 percent (in some cases below) of the average energy bill. Hence, you should take considerable approach to reduce the PC's carbon footprint.

Several major sites on power and energy include a section specifically designed for young people.

Cool, stick-on electronic components. Could be a great tool for letting students create imaginative, innovative projects!