4.
Mouse Trap
Take a Post-It note and place it over the eye of the victim's optical mouse. When the victim tries to use his or her computer, the cursor won't move. Be sure to write "April Fools!" on the note! (Note if they have a standard mouse, you can perform the same trick by taping a piece of paper over the ball underneath the mouse.)
"Tonto" in spanish translates to "FOOL" in English. All those years of watching the Lone Ranger and Tonto (the fool) in action, and I never would have guessed that he was insulting his partner.
PROPAGANDA AND APRIL FOOLS DAY
http://goodstuff4u.multiply.com/journal/item/406/