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Blinkers and Buzzers: Building and Experimenting With Electricity and Magnetism
Blinkers and Buzzers Building and Experimenting With Electricity and Magnetism Author:Bernie Zubrowski Traffic lights, telegraphs, and burglar alarms are just a few of the exciting battery-powered models that can be built from this involving book. Fifty creative experiments show how and why these devices work while providing hours of hands-on learning fun. A Boston Children's Museum Activity Book.