This special plastic sheet shows two optical illusions. Firstly, the concentric circles in the middle look ...
Paul Baars Design
This special plastic sheet shows two optical illusions. Firstly, if you stare at the small cross in the centre, ...
This special plastic sheet shows two optical illusions. Firstly, the large square in the centre appears to have ...
This special plastic sheet shows two optical illusions. Firstly, the central disc seems to move when you alter ...
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