This is an Euler's Disk

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Toysmith Euler's Disk

Euler's Disc, 3 pcs., Energy

PDF) Rolling and slipping motion of Euler's disk

Toysmith Euler's Disk Brand New.

PDF) Euler's disk and its finite-time singularity

Vintage Euler's Disk STEM Spinning Science Into Art Tangent Toy

Euler's Disk

Euler's Disk

Rolling and Slipping of Euler's Disk – Spin a coin and watch it