1. Spooky Silhouette:
- Wait for your sister to be alone in a dark room.
- Cut out a frightening silhouette of a ghost or a monster from black paper.
- Stick the silhouette on the window behind a curtain so that it's visible from the inside.
- When your sister looks out the window, she'll get a fright!
2. Under the Bed:
- Hide under your sister's bed and wait for her to come to sleep.
- When she's settled in, make scary noises or tap her foot.
- She'll be terrified when she realizes there's someone under the bed!
3. Creepy Doll:
- Find an old, creepy-looking doll or make your own.
- Place the doll in your sister's room, on her bed, or in a closet, where she'll least expect it.
- When she finds it, she'll be spooked by its eerie appearance.
4. Fake Phone Call:
- Pretend to receive a phone call from a mysterious caller who knows things about your sister.
- Whisper in a sinister voice and mention ominous details that make it sound like she's in danger.
- When you hang up, your sister will be scared and wondering what's going on.
5. Unexpected Hand:
- Stand behind a door or a corner where your sister will pass.
- As she walks by, quickly reach out and grab her hand.
- When she turns to see who grabbed her, you'll be right there, waiting with a mischievous smile.
Remember to stay within the bounds of good humor and make sure your pranks don't cause any real harm or emotional distress. Ensure your elder sister is comfortable with being pranked and that you can both have a laugh about it afterward.