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How the stripped-down motor works, including a discussion of how electricity and magnetism combine to drive the machine. Troubleshooting tips for making sure your stripped-down motor works well. A more detailed explanation of how the stripped-down motor works. An introduction to an instrument much like a saxophone but made of a water bottle and a paper tube. A detailed demonstration of how to make the saxophone-like membranophone, including a discussion of materials needed. The science behind the water bottle membranophone, including a discussion of how air vibrates the instrument's membrane, producing sound.
An introduction to a spinning disc called a stroboscope, which lets you create your own animated cartoon. A detailed demonstration of how to make a stroboscope, including a discussion of materials needed. The science behind the Whirling Watcher stroboscope, including a discussion of the phenomenon called persistence of vision, which in this activity creates the illusion of a galloping horse. An introduction to the jitterbug, a simple motorized toy made of a recycled CD and a DC motor.