(つ◔౪◔)つ━☆゚.*・。゚ The 2021 TKSST Gift Guide ✩°。⋆・゚  
The Kid Should See This

Euler’s Spinning Disk

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We love this video of Euler’s (sounds like Oiler’s) Spinning Disk, not only because of the physics behind how long it spins on the slightly concave mirror base, but also because of the intense, hypnotic sound it makes, especially toward the end.

Euler’s Disc was invented by Joseph Bendik in the 1980s, while he was working for an aerospace firm in California, and spinning coins on the cafeteria table. He named it after Leonhard Euler, a Swiss mathematician and physicist who lived from 1707 to 1783, and who did some of the pioneering work on spinning and rolling objects.

Want to watch it again? You can enjoy Euler’s Spinning Disk demonstrations both in French and with a British accent, too.

This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.

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