artist cleverly blended their figures into the lines and shapes of the picture.
This type of optical illusion tests how sharp your eyes and mind really are.
Many people look at this picture for minutes without spotting anything unusual.
Some see one child almost immediately but struggle to find the second one.
Others get confused by the shading and texture of the furniture and background.
To uncover the secret, you need to change the way you look at details.
Sometimes, scanning the image upside down or from a different angle
