2. Optical Illusions

3. Black spots appear at the intersections.

4. The grey centre bar is the same shade everywhere! - Watch

5. Move your head forwards and backwards while looking at
the black dot. What appears to happen?

6. There is a pipe in the
stream of water that
holds up the tap and
supplies the water!

7. Focus on the cross in the middle – what happens?

8. Rabbit or duck?

9. Rabbit or duck?

10. Circle or
spiral?

13. M.C.Escher

18. This is a perfect circle –
honest!

19. The thick
black lines
are parallel.

20. B or 13?

21. You guessed it. The red lines
are straight.

23. How many legs?

24. Young lady or
old lady?

25. Really truly
nothing is moving
here!

26. Can you see the 10 in the orange circle?

27. What number is visible in the coloured
circle? If you are colourblind you may
see no number – like the grey image.

30. Practical and sporty

32. Can you find mother and child?

34. A dog in
the snow

35. A dog in
the snow
Now can
you see
him?