1. Remote Control Car Surprise:
Get a remote-control car and secretly place it under her bed. When she least expects it, use the remote control to make the car move, creating a spooky or surprising moment.
2. Silly String Mess:
Fill her room with silly string while she's away. When she comes back, she'll be in for a sticky surprise!
3. Fake Spider:
Place a fake spider in a drawer, a book, or her shoe so that she finds it unexpectedly and gets startled.
4. Disappearing Ink Message:
Write a funny message on her arm or hand using a disappearing ink pen. Then let her discover the disappearing act, leaving her confused and entertained.
5. Upside-Down Room:
While she's out, flip all the furniture and decor in her room upside-down. When she comes back, it'll be like she's entered an entirely different world!
6. Fake Snow:
Fill her windowsill with fake snow during the warmer seasons. When she opens her window, she'll be surprised to find a snowy wonderland inside.
7. Mirror Drawing:
Draw funny faces or messages on her mirror using dry-erase markers. She'll discover the surprise when she looks in the mirror.
8. Cookie Monster:
Dress up as the Cookie Monster and hide in the kitchen. When she opens the fridge or pantry, she'll find a real-life Cookie Monster ready for a snack.
9. Singing Alarm Clock:
Set her alarm clock to wake her up with a funny song or a surprising sound effect instead of the usual beeping.
10. Invisible Hand:
Use string to tie a plush toy to the door knob behind the door. When she opens the door, the toy will move as if an invisible hand is pulling it, creating a spooky effect.
Remember, pranks should always be done in good fun and with the intent to bring laughter, not embarrassment or discomfort. Before executing any prank, make sure your sister would appreciate the joke and won't be genuinely upset.