Euler’s Disk is one of the coolest physics toys we have tested. When you give it a spin and traces a cone shape. As it slows down, the wobble speeds up. You can use a flash light and various magnetic holographic discs to put on a show. This is the LED version of it.
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This has a button on its body to turn on the light feature. Unlike the original Euler’s Disk that covered on YouTube, this new version doesn’t seem to ship with holographic covers. You also get the best result in dark rooms. This has 7 LED nodes on one side. A titanium version is also available.
Euler's Disk Physics Toy ▶ Gadgetify
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