1. Is this a block with a piece cut out or a piece stuck on a box?        Answer
 
 
 
 

5. What does this letter say?  Are you sure?         Answer
 
 
 
 

8. Swing your head right to left slowly.  What happens?         Answer
 
 
 
 

Optical Illusions trick your brain.  Basicly it's something you see that is not exactly what it appears to be.  The pictures at first glance look normal, but look closely and you'll see something else.  When you look at an Optical Ilusion, a message is sent to the brain telling you it is this instead of what it is supposed to be.  This is called an Optical Illusion.