1. Text a GIF of the "typing" symbol to make your friends wait for a response that never comes.
2. Put a note on someone's car that says "sorry about the damage, had to leave" and watch them look all over for the nonexistent damage.
3. If you can get into someone's phone, change their autocorrect shortcuts.
4. Add photos to your family or office wall.
My brother has been replacing family photos with pics of Steve Buscemi and my mom hasn't noticed
Steve Buscemi is a great option, but for a little more flair, you might want to go with astronaut sloth.
5. Buy a ton of rubber ducks and hide them.
6. Bring a totally normal box of donuts or another delicious food in to work, and leave it out with a sign that says "April Fool's!" Then watch everyone try to figure out what you did to it.
7. Tape a photo of Nic Cage, Shrek, or whoever else you want to the top of the copier.
8. Fill a mayonnaise jar with yogurt or vanilla pudding and eat it with a spoon in front of people.
9. Hide battery-powered alarm clocks throughout their room.
10. If you have the time, tools, and materials, turn someone's bedroom into a closet.
11. Text them random stuff to make them think they subscribed to it.
12. Print this out and tape it next to your office's printer.
13. Hide a baby monitor or walkie-talkie in a closet or ceiling and meow into it.
14. Start placing pennies in random spots where the person will find them. Then start placing more and more pennies.
15. Rearrange your roommate's dresser drawers. For added effect, continue to do it over time.
16. Screenshot their desktop, remove all of their icons, then set the screenshot as the background.
17. And finally, put googly eyes on EVERYTHING.
