Put a piece of bubblewrap under the toilet seat so when your victim sits, they are surprised by a loud POP!
You Spilled What
Find an old bottle of nail polish that you don't want anymore. Unscrew the cap and set it sideways on a piece of waxed paper, letting the contents flow out into a puddle. When it dries completely, peel it off of the paper. Now you can put it anywhere and trick someone into thinking there is spilled nail polish. Works best on something your victim cherishes or on one of their important documents!
Two Black Eyes
Put a dark substance around the eyepiece of a pair of binoculars (we recommend dark eye-shadow instead of the black shoe polish used in the classic prank of yesteryear). Hand them to your victim and point out something for them to look at in the distance. Then laugh at the dark circles around their eyes.
Find a scrap of cloth. Place a dollar on the floor and stay nearby. When the victim comes by and bends down to pick up the dollar, rip the cloth loudly. Most people will reach back to see if they ripped their pants. One of the original classic April Fool's pranks of all time!
Either late on March 31st or very early on April 1st sneak into a shared office and unplug two phones and re-plug them in with the lines crossed. Both victims will go nuts trying to figure out why they're getting each others' calls.
The Walls Have Eyes
Stop the Calls
If the victim has a phone with a hook that presses down when the handset is in the cradle, tape it down. When he or she answers a call it will keep ringing.
Has your victim been working on an important document on their computer? Carefully hide the document in a safe place, then create a fake document with the same name. Fill the document with gobbledy-gook or a funny story. At the bottom put "April Fool's!"
Sneak onto your victim's computer and do a Google search for something really embarrassing (hemorrhoids, gender reassignment surgery, butt pimples, etc.). Leave the results window open for all to see!