Good Water Prank on Sister and Friends:

Put two hands, palm side down, with tips of fingers touching, on the table, let someone help you and balance a cup of water on top of each hand, then have someone take it off. Then bet that they can't do the same thing. Once they have it balanced on their hands, have everyone leave the room. They won't be able to get it off without spilling it.

Fake Spy Camera Prank

by Mckinley and Linda
(Arkansas and Virginia)

We opened up the webcam on my laptop and went into my sister's room and took a webcam picture of her room when no one was in it. Then we made a fake camera by putting a small christmas light inside of one of her toy animal's stomaches. It has a piece of tape under it with RECORDING printed under it. We went back into my room and set the picture taken on our laptop to full screen. Then we pulled up a word document and typed random letters and numbers all over it. This made it seem more real. We started laughing once my sister was in her room so she would come see why we laughed. She walked in and saw her room on the screen and freaked out.

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Great Prank on Sister

by Charlie
(UK)

We were playing truth or dare and she said dare. I said I dare you to wash your hands with the tap on full power. I put sellotape under the tap so that it squirted all over her. I ripped off the tape and she dared me to do the same and I didn't have a drop on me. I advise you to leave a bath mat around because the floor got really wet.

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Scavenger Hunt Rip Off (Great for Younger or Older Sisters)

by Mckinley and Linda
(Arkansas and Virginia)

Get five sheets of paper and cut them up into note card sizes. Write little clues leading to random places in your house. Make them think there will be a big prize at the end, but there will not be one. This will make them run around all day looking like fools and earning nothing.

P.S: Or the prize could be something really awkward, like an empty lipstick/lip gloss, even a box of cake mix with instructions to bake the cake for you.

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Good prank on teen sis/bro

by Redheart
(GA)

When your sister/brother (best works if in their teens, it will be more embarrassing to them then) is asleep, get some warm-ish water in a PLASTIC bowl and put their thumb in it. P.S only do this prank if they are wearing FLANNEL pj's it will be more noticable. Watch them wet the bed. If they don't wet, pour the bowl of water slowly on their privates. Take a pic. Then show them in the morning, and then tell them you will give it to their boyfriend/girlfriend unless they wear a disposable nappy for a WEEK. Then give both pic's to the BF/GF anyway.