Toysmith Euler’s Disk – Create A Hypnotic Display of Light
https://www.amazon.com/Toysmith-791709-Eulers-Disk/dp/B000239E6Q
WebJun 1, 2017 · Spin science into art: Euler’s Disk is a chrome-plated steel disk that produces a captivating sonic hum and a magical holographic display; swap holographic foils for different visual effects; perfect for desk décor or office toys to help increase focus. Learning reimagined: Inspired by the inventor of f (x), and Euler’s formula; disk is ...
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