Up or down?
What do you see?
Musician or a woman?
Hermann-Grid effect. Can you count black dots?
These lines are completely parallel
A lady, old man and a old woman
See the text? 
3 D Illusions
How many????
(faces, animals…)
How many legs?
How many fox?
Can you find 13 faces?
and people?
Find out 9 people!
The same man
Both circles in the center are equal!
These pictures move?
Focus on the plus sing in the center. What did you see?
