This one is great to prank your colleagues who work on a computer during April Fools' Day. Switch their computer screen upside down during a break.
This is a fun way to prank one of your colleagues. When they go on break use CTR, ALT [ARROW] to switch their screen upside down.
Also turn the screen off. When they return, they'll probably say something like: "very funny guys", only to find out that the screen is upside down!
More April Fool Pranks
Hang up teabags outside someones room. It's excellent to do this to your roommates for an extended period of time, eventually they will lose it! You'll see :)
This one is great to fool your kids. When your kids are asleep the night before April Fools day you use food coloring to turn the milk in the carton blue!
Plants in your coworker's keyboard
This prank needs some preperation but is really worth it. Your coworker will show up and his keyboard will be full of little grasplants!