1. Post-It Notes: Cover someone's belongings (like a laptop or a desk) entirely in Post-It notes.
2. Invisible String: Attach an invisible string to an object in someone's room, making it seem like the object is moving on its own.
3. Switch Room Accessories: Swap various items in someone's room, such as lamps, posters, or towels, with those of another room.
4. Fake Class Announcement: Create a fake class cancellation or change announcement and post it on a public board. Watch as people check the notice and react with confusion or frustration before realizing it's a prank.
5. Photo Booth Hijinks: Hide behind a corner or inside a photo booth and jump out to startle people taking pictures.
6. Reverse Parking: If someone parks in a crowded lot, turn their wheels toward the curb so that when they return, they think they parked the wrong way.
7. Mirror Notes: Write funny notes or drawings using erasable markers on a roommate's mirror before they wake up.
8. Confusing Room Numbers: Remove and rearrange room numbers on dorm room doors so people end up going to the wrong rooms.
9. Musical Chairs: While someone is out of their room, take their chairs and hide them in another room or behind furniture.
10. Cookie Surprise: Replace regular chocolate chip cookies with Oreos or other non-chocolate chip cookies and watch as unsuspecting friends grab them.
11. Altered Alarm: Change the alarm time on someone's phone or clock so that it goes off at an unexpected hour.
12. Water Bottle Switch: Swap out someone's water bottle with a different one, maybe filled with a colored liquid.
13. Invisible Tape: Tape down items like pencils, mousepads, or even utensils so they're harder to pick up.
14. Elevator Buttons: Apply clear tape to a few elevator buttons so they don't work properly.
15. Library Treasure Hunt: Leave clues and riddles that lead your friend on a treasure hunt around the library for a small treat or prize.
Remember to keep these pranks lighthearted and harmless, and always respect the boundaries and belongings of others.