The extra-long 7.5 cm diameter slinky makes it fun for kids to learn about longitudinal and transverse waves. It extends to 9 meters and measures about 10 centimeters when compressed.
Of course, many adults remember hours of fun watching the original extra long slinky "walk" down stairs. And this one can do that, too! Some reviewers say this version is smaller in diameter than the original but also longer, heavier, and stretchier. Overall, it's a sure-to-please modern update on an old classic.
To use in classroom settings, this slinky works well for group physics labs. An extra long slinky also helps students visualize P and S waves and study earthquakes.
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