Ideas

1. Replace their shampoo with mayonnaise.

2. Set their phone ringtone to a loud, embarrassing sound without them knowing.

3. Fill their room with balloons while they're sleeping.

4. Wrap their desk or workspace entirely in aluminum foil.

5. Put googly eyes on all their belongings.

6. Replace their toothpaste with mashed potatoes.

7. Leave a fake spider in their shoe.

8. Set their computer's autocorrect to change common words to silly ones.

9. Create a fake parking ticket and place it on their car.

10. Fill their office chair with confetti.

11. Swap the sugar and salt containers in their kitchen.

12. Put a "for sale" sign on their car.

13. Replace their regular coffee with decaf without telling them.

14. Fill their umbrella with glitter.

15. Put a fake bug in their cereal box.

16. Attach an air horn to the back of their chair.

17. Replace their favorite snacks with healthy alternatives.

18. Put a "voice-activated" sign on a regular appliance and watch them try to use it.

19. Fill their room with inflatable flamingos or other quirky decorations.

20. Leave a trail of sticky notes leading to a harmless surprise.

21. Change the language settings on their phone to a foreign language.

22. Hide a small speaker in their room and play random funny sounds.

23. Put a "Do Not Disturb" sign on their door when they're not home.

24. Create a fake social media account and leave funny comments on their posts.

25. Replace their hand soap with jello.

1. Switcheroo Breakfast: Replace the cereal with a similar-looking but unexpected breakfast item like popcorn or candy.

2. Frozen Spoon Surprise: Freeze a spoon in an ice cube and serve them a drink with it.

3. Fake Insect Invasion: Place fake insects in unexpected places like under their pillow or in the bathroom.

4. Upside-Down Room: Rearrange the furniture in one of the rooms to make it look like everything is upside down.

5. Fake TV Remote: Replace the batteries in the TV remote with dead ones and watch their confusion.

6. Silly Portraits: Replace family photos with silly or edited versions for a day.

7. Balloon Avalanche: Fill a closet or bedroom doorway with balloons and wait for their surprised reaction.

8. Mystery Switches: Tape over some of the switches in the house, so they don't work temporarily.

9. Colorful Water: Add food coloring to the water in the bathroom sink or showerhead for a colorful surprise.

10. Whoopee Cushion Surprise: Place a whoopee cushion on their favorite chair or sofa.

11. Remote Control Prank: Use a universal remote to control the TV subtly while they're watching it.

12. Fridge Swap: Rearrange the items in the fridge so everything is in a different place.

13. Toothpaste Swap: Replace the toothpaste with cream cheese or another non-toxic substance.

14. Alarm Clock Trick: Set their alarm clock to go off at a random time during the night.

15. Sneaky Speaker: Hide a small speaker in a room and play funny sounds or music at unexpected times.

Tech Pranks:

1. Change the language settings on their phone to a foreign language.

2. Set their computer's desktop wallpaper to a screenshot of their desktop, so it looks like everything is frozen.

3. Use a wireless mouse or keyboard to control their device remotely.

4. Install a fake cracked screen protector on their phone.

5. Swap the buttons on their TV remote.

Bathroom Pranks:

1. Place a plastic wrap over the toilet seat (underneath the lid) so it's not immediately visible.

2. Fill the bathroom sink with fake ice cubes.

3. Replace their regular soap with a bar of soap that doesn't lather.

4. Put a small piece of tape over the sink faucet so the water sprays everywhere when they turn it on.

5. Hide a water-activated musical greeting card under the toilet seat.

Outdoor Pranks:

1. Fill their garden hose with glitter.

2. Put a "Free Stuff" sign on their mailbox and watch people come to collect nonexistent items.

3. Tie helium balloons to their outdoor furniture so it floats away slightly when they go to use it.

4. Place a fake animal footprint trail leading to their front door.

5. Plant plastic flowers in their garden beds.

Personal Pranks:

1. Replace their favorite snack with a healthy alternative in the packaging.

2. Put a fake spider in their wallet or purse.

3. Change the ringtone on their phone to a funny or embarrassing sound.

4. Swap their regular coffee with decaf without them knowing.

5. Replace their regular pillowcase with one that has their face printed on it.

Pet Pranks:

1. Attach a small toy to their pet's collar and watch their confusion.

2. Put a cat-sized cardboard box with a "Free Catnip" sign in their yard.

3. Place a fake fish in their pet's water bowl.

4. Hide a squeaky toy in their pet's bed.

5. Replace their pet's food with a different brand (make sure it's safe for them).