Wrap every single desk item in tin foil. Tape dispensers, stapler, computer, keyboard, mouse, etc.
Remove the ball from the bottom of their mouse and see how long it takes for them to figure it out. Then send an email with a picture of it telling them you are holding it for ransom.
Go Post It Note Crazy. Have a bunch of your coworkers help cover every square inch of their desk or cubicle with post its.
Make some photo copies of a paper clip then put the paper back in the copier. Watch people go nuts as they try to find the paper clip that keeps showing up in their copies.
If you happen to have a phone that allows conference calls you can trick two people at the same time. Simply call both of them – conference them in with each other and listen as they argue back in forth “No, you are the one who called me!”
Hook all of their paper clips together and put them back in their tray. Every time they want a paper clip they will have to undo them.
Glue all their pen caps to the top of their pens.
Place a clear piece of tape over the mouth piece of their phone. Watch them yell louder when people can’t hear them on the other end.
Leave them a phone message that Mr. Behr or Mr. Lyon called. Then leave the number of the local zoo.
Photoshop a bunch of funny photos with your co-workers face on them and tape them all over the desk. Be sure to hide some in their files, drawers and books so they will keep finding them for months to come.
Wrap 100 rubber bands around their entire phone. Make sure they are big enough to stretch around the entire phone. Watch them go nuts undoing it all so they can use their phone.
Borrow all the pictures on their desk. Scan the photos, photoshop monkey or animal faces on their friends and family then place the new photos back in the frames. Wait to see how long it takes for them to realize it.
Fill at least 20 paper or plastic cups with water. Staple them all together. Watch them try and figure out how to get rid of them without spilling it all.
Borrow the victims’ car keys and make a copy. Then every day move their car a few parking spaces over. One day even park it backwards. Wait to see how long it takes for them to think they are losing their mind.
If they have a cubicle, fill the entire cubicle with multi-colored balloons.
Put their stapler, tape dispenser or computer mouse in unformed jello. Let it set in the fridge overnight and then put the entire thing back on their desk. Make it a yellow or light colored jello so they can see through it.
Ask your coworkers to bring in all of their unused Christmas wrapping paper and gift wrap every single thing in the targets cubicle including their chair, desk and computer.
Get an old keyboard that looks similar to your coworkers, pop off all of the keys, then when you put them back on, spell a message such as “Al got punked” “Al” on the top line in the center, – “got” on the second line and “punked” in the center of the bottom. Replace with their keyboard.
Create a chalk outline of a body in the middle of their floor with masking tape. Make it look like the “body” was in a really weird position when “it” died. Place police caution tape across the front of their office door. Watch their face when their first thought is that someone was killed in their office.
Mess with their computer. Change their desktop background and their screensaver to a funny picture of them that you photo-shopped. Set the screen saver at least 3 minutes so it takes awhile before it pops up on their screen. This way after they have to reset their background – they will then have to reset their screensaver. Set a funny sound to their mouse when they click on something – change the pointer so instead of them seeing their typical hourglass – they have to sit through a peeling banana.
Note: While most of these pranks are funny and harmless, be careful just the same.
Never prank a coworker that you do not like or do not get along with. Then it is not funny, it is just harassment.
Keep it classy! No nude pics or anything of an offending sexual nature.
Be sure your coworker or boss has a sense of humor.
Always double-check the day you plan on pulling one to ensure that no special clients are going to be coming in that day. The last thing you need is to have your boss embarrassed.