Now that's clever

[Simpo Two]

A plastic thingy made by a Japanese professor...

https://www.facebook.com/reel/1057095339536548

Maybe he can do Escher's cricket stumps too?!

[Russ35]

The professors Youtube channel

https://www.youtube.com/@kokichisugihara3277/video...

or if you want to buy one of the rounding square https://www.grand-illusions.com/rounding-square-c2... or

Cylinder in a box https://www.grand-illusions.com/cylinder-in-the-bo... or

Ladies and Gentlemen https://www.grand-illusions.com/ladies-and-gentlem... or

Heart Metamorphosis https://www.grand-illusions.com/heart-metamorphosi...