Write a message on an upside-down paper cup that alludes to something horrible being trapped under it. Leave it on a coworker's desk or in a conference room.
Put a "Please Use Other Door" sign on the entrance to your office building if it only has one entrance.
Change the coffee in the office coffee maker to decaf.
Pull on a coworker is to press ctrl+print screen on their workstation, then paste it into Paint, save the pic, and set it as the desktop background. Move all of their icons to the trash. When they get back to their desk, clicking won't accomplish anything!
Put tape over the optical sensor of someone's mouse.
Peter called his doctor’s office for an appointment. "I’m sorry," said the receptionist, “we can’t fit you in for at least two weeks." "But I could be dead by then!" "No problem. If your wife lets us know, we’ll cancel the appointment."
Find a sleeping person, fill their hand with shaving cream and then tickle their nose.
I just recently discovered that there is a national holiday named after Atheism. April FOOLS day. Like this story in the name of Jesus.
A lawyer has just settled down in his new office. So now, he is thinking what he can do to have clients. After a long time thinking, a man comes into the office. Right away, the lawyer decides to make his new plan take action. So he picks up the phone and says: "Unfortunately, Ms. Onassis, I cannot undertake your case right now. I am working full time, call me in a month to see if I can help you." He puts the phone down and says to the waiting man: "How can I help you sir?" "Nothing really, I am from telephone communications, I just came to connect your phone."
Install the Blue Screen of Death screen-saver on someone's computer.
Paint a bar of soap completely with clear nail polish so it won't suds up.