I love these simple anamorphic illusions.  They demonstrate just how much our brains interpret the environment we live in and how easily they can be fooled!
 

 
Here are the links to the images used in the video:
Rubiks Cube
Tape
Shoe

Print them on 8.5 X 14. Cut the paper any way you like to add more of an effect.

Here is another one to keep you amused Incredible Shadow Illusion.