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00:10:32
A detailed demonstration of how to make the saxophone-like membranophone, including a discussion of materials needed.

00:01:54
The science behind the water bottle membranophone, including a discussion of how air vibrates the instrument's membrane, producing sound.

00:00:45
An introduction to a spinning disc called a stroboscope, which lets you create your own animated cartoon.

00:04:32
A detailed demonstration of how to make a stroboscope, including a discussion of materials needed.

00:00:47
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.

00:01:32
An introduction to the jitterbug, a simple motorized toy made of a recycled CD and a DC motor.

00:10:57
A detailed demonstration of how to make this toy, including a discussion of materials needed.

00:01:41
The science behind this toy, including a discussion of how electric circuits work, and how an unbalanced load (an off-center weight on your jitterbug) results in rotational vibration.