Some of these are good. Have fun!!!
Strung Up
Attach a string to the back of the victim's desk drawer. Then run it up the wall, into the suspended ceiling, to a small container attached to the ceiling directly over the victim's head. When the drawer is opened the string will be pulled, dropping a shower of confetti onto the victim's head.
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Kidnapped
Take an item from the victim's office (something they use a lot such as a special coffee cup, stapler, pencil cup, etc.). Take a picture of the item and leave it on the victim's desk (in the same spot where the item was located), along with a "ransom" note.
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Not Silent, Not Deadly
Set the ring tone on your cell phone to an embarrassing bodily function and turn the volume up all the way. Hide your phone in their desk or under their chair. Call your cell phone from your desk phone. Everyone will think your victim has a problem!
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Trapped in Plain Sight
Take a token item from the victim - place it in a Jello mold, freeze it in a bottle of water, place in the center of a rubber band ball, etc. Keep taking the item and pranking the victim repeatedly.
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Where Do I Go?
This trick works great if you work in an office building that has two entrances. Print up two signs that say "Please Use Other Door." Put one on each door, with arrows pointing toward the opposite door.
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Clipped
Make some copies of a paperclip. Then put them into the paper tray of the copier. People will go nuts trying to find the paperclip stuck in the printer.
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Stale Joke
Buy a box of donuts several days before April 1st. Keep them in the refrigerator with the top open until they are very dried out. On April Fool's Day put them by the office coffee maker so everyone will help themselves!
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Squeaked By
First, take out your friend's drawer. then tape a squeaky dog toy to the inside so that when you put it back and slide it in, it goes, "squeak squeak!" when it's squashed
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Time Off Trickery
Coordinate everyone in your office to play a practical joke on your boss. Throughout the day, each person should email, voicemail or leave a note for the boss, saying they need extended time off. Each person should give a different explanation: pregnancy, sick family member, etc.
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Invisible Ink
Go into the victim's office and locate every pencil and pen in their desk. Paint the tips with clear nail polish. When they try to write, none of them will work. (After the prank is revealed, the nail polish can be removed by dipping the pens and pencils in polish remover.)
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Take the Call
Use glue to secure the victim's handset to the phone (be sure to use glue that can be removed...check the label first because some glue will destroy plastic). Then go to a nearby phone, call their number and watch while they lift the entire phone to their ear.
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Totally Labeled
Place post-it notes on every item on someone's desk labeling what each thing is. EVERY ITEM. Vintage office prank.
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Can You Do It
If he has an overhead bin style cabinet, layer the bottom with paper, then attach the paper to the door (with tape or something) so it comes out when the door to the cabinet is open. Then fill it with empty soda cans. When he opens the door to his cabinet, viola, all the cans will come crashing out and it will be most embarrassing for him.
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Drawer Confusion
Remove the desk drawers in the victim's desk and switch them around. (If you can't remove the drawers, just take out the stuff and swap it around.)
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Weakling
Steal all the victim's pens and replace them with pens that have the caps glued on.
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Turn It Off!
Find an old toy with button-activated sound (music, baby crying, etc.). Tape it to the back of the victim's desk drawer, so that when the drawer is completely shut the button is activated. Leave the drawer open a crack, and wait for victim to arrive.
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Lost Lockers
Do you have lockers at your work? Are they moveable? If so, sneak in the night before April 1st and switch them around. It creates great confusion the next day!
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Hurry Up In There
Take a pair of pants, stuff them and attach a pair of shoes. Place them in the bathroom stall so it looks like someone is "sitting." Lock the door and crawl out under the door. If the bathroom has more than one stall, you'll need to make enough "dummies" to fill them all. For added effect, make a tape recording of authentic "sound effects" and play it on a loop from inside the stall. This is one of the more elaborate office pranks, but worth the effort!
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Musical Chairs
Take the fancy office chair out of the boss's office and switch it with the ugliest chair. Whoever had the ugliest chair will probably be happily surprised to see their "new" chair, and the boss will probably be embarrassed to have to come and take it away. Of course, you better make sure your boss has a good sense of humor!
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Soft Hat
For a person who is required to wear a hard hat at work: hide their hat replace their hat with one you have painted bright pink, or otherwise decorated in an embarrassing way. Unless they can find someone who will loan them one, they'll be forced to wear it all day.
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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 the phone will keep ringing.
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Fresh and Queasy
Go to a dollar store and buy alot of different scented air fresheners (for the car or home). Hide them in the victim's office. Tape them to the bottom of drawers, tables and chairs, and behind furniture that is up against a wall, etc. The mesh of smells will be overpowering!
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Switcheroo
Remove your victim's desk chair and replace it with a bench from outside (the heavier the better!).
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Just One Please
Take all of the victim's paperclips and hook them together in one long string.
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Dude, Where's My Car?
Borrow your victim's car keys and make a duplicate. Then, every day or so, move the car a few parking spaces over, or turn it around so it's parked backwards in the space. Eventually start moving it to another part of the lot altogether. Classic.
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Crackling Stapler
Hide a "cap" (mini-firecracker made for toy cap guns) under the handle of your victim's stapler.
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Copier Surprise
Print out some pictures of a scantily-dressed girl, or other racy image. Mix them into the paper tray of the office copier or printer. When the victim makes copies, they'll have a big surprise!
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A Call From Above
If you work in an office with a suspended ceiling: Hide his phone in the ceiling tiles above your victim's desk. When they arrive...give them a call!
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Have a Seat
Take all the chairs you can find from other offices, the conference room, etc., and fill up your victim's office as full as possible.
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Oh So Pretty
Replace everything on your (male) victim's desk with similar items, but make them as "girly" as possible (pink pens, lacy picture frames, bows, flowers, etc.). Remember to change his screen saver too!
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Blown Away
Put confetti in your victim's fan (tape the bottom to hold in the confetti if necessary).
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Can You Hear Me Now?
Place a piece of clear tape over the microphone part of the phone. Laugh as your victim struggles to talk to their callers.
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Faint Sounds of Annoyance
Hide a small radio or music player in the ceiling tiles above the victim's desk. Turn the volume very low so they'll only hear it once in a while. Tune it to a music station they hate. Or, even better--try using a "relaxation" tape like rain or ocean waves or a heartbeat--it'll drive them crazy!
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Stringing Them Along
Using fishing line or black thread, tie everything on your victim's desk--stapler, tape dispenser, pencil cup, etc.--to his chair. When he pulls the chair out, everything on his desk will go crashing to the floor! Or, attach everything on your victim's desk to the back of one or more of his desk drawers (string the line through the holes in the top of the desk). When he open the drawer, all his stuff will go crashing across his desk.
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Rude Awakening
Plug a radio into the power strip that your victim's computer is plugged in to. Turn the volume all the way up. Now turn the power strip off. Your victim will at first be puzzled why their computer won't turn on; and then will get a big surprise when they flip their power strip on.
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Topsy Turvy
This prank is elaborate but fun: Remove all the drawers from the victim's desk. Flip the entire desk upside down, replace the drawers, then flip the desk back. Now when the victim open the drawers, all the stuff will fall out straight to the floor.
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Crossed Wires
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.
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Who's That Guy?
Photoshop his face into a bunch of funny scenarios and put them up all over the office.
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Redecor-Hate
First, determine what your victim's least favorite thing is--sports team, political view, movie, music, etc. Then cover his or her work area with posters and items celebrating that thing.
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Monkey Trouble
Borrow all the pictures from his desk and office. Scan the photos, and use a photo-editing program to put monkey faces onto everyone's faces. Print them out and place them back on the victim's desk.
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Pick Up the Phone!
Take a small piece of wire and wrap it around the handset cord of the victim's phone. Place it so both ends of the cord are attached together. Then wait until the victim receives a phone call and watch while they lift the handset and they pick up the entire phone along with it.
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The Walls Have Eyes
Buy a bunch of googly eyes from a craft store and stick them everywhere all over a person's desk.
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Have fun