And I keep plugging away at this Wave Machine thing. With its new look modelled after the Eiffel Tower Carousel, it now generates two kinds of waves when you move the top ring and flag pole individually. More interestingly, combining the two motions adds the two waves together and allows you to observe a physics phenomenon called wave interference. Observe what happens when two different waves propagate through each other.
The resulting wave becomes amplified or cancelled depending on how the original two interact with each other. The plan is to continually develop this "toy" and hopefully it will engage more girls in the STEM (science, technology, engineering, and mathematics) fields in the future.