The best harmless prank to play on your brother or sister is signing them up for daily cat facts by text: all you need is their phone number, it's anonymous, and they can end it any time by replying STOP. Go to catfactstexts.com, enter their number, pick how many facts a day, and the first fact arrives within seconds.
Siblings have been pranking each other since the first younger brother existed. Here's how to keep the tradition alive without getting anyone grounded.
What makes a good sibling prank?
- It's funny to both of you. Your sibling should laugh too, eventually.
- Nothing breaks. No damaged stuff, no ruined clothes, no messes for anyone else to clean up.
- No one gets scared. Jump scares and fake emergencies aren't pranks. Keep it absurd.
- Parents would approve. If you'd have to hide it from them, skip it.
Why is the cat facts prank great for siblings?
- They'll never suspect you. Texts come from the Cat Facts number, not yours, and we never reveal who signed them up. Act just as confused as they are.
- It works across the country. Brother at college? Sister in another state? All you need is a phone number.
- It runs on its own. You don't have to do anything after signup. The facts keep arriving.
- It's cheap. One fact a day is $2.99 a month. Up to 15 a day is $40.50. Every plan is on the pricing page.
- There's a free version. The free cat facts prank sends 3 facts, one a day, then stops on its own.
One honest note: paid plans renew monthly until cancelled, and a recipient replying STOP ends the texts but does not cancel billing. If it's a short bit, cancel from the unsubscribe page when you're done. Under 18? Ask a parent before buying a plan.
What are other harmless pranks to play on a sibling?
- The cereal swap. Pour their favorite cereal into a different box. Swap it back the same day.
- Googly eyes everywhere. On the milk carton, the toothpaste, the TV remote. Packaging only, never food.
- The backwards room. Turn every picture frame in their room upside down. Wait.
- The sticky note storm. Cover their door in sticky notes, each with a different cat fact.
- The fake spider. A plastic spider in the bread bag. Small, harmless, classic.
- The ringtone change. With their okay to borrow the phone, set your contact's ringtone to a meow.
- The voice memo. Send them a voice memo that is just you saying "cat facts" in a whisper. No context.
- The secret photo shoot. Set their phone's wallpaper to a dramatic photo of the family cat.
- The compliment flood. Text them one sincere compliment an hour for a day. It's deeply unsettling.
- The double cross. Get a parent in on it, then have the parent "accidentally" sign them up for cat facts.
What are good pranks for an older brother or sister?
Older siblings are hard to fool, so go slow. A cat fact a day is perfect: no single text is suspicious, but by day five they're asking everyone. Want to escalate? Sign up their group chat friend too, and let the facts spread. Ideas in group chat pranks.
What are good pranks for a younger brother or sister?
Keep it gentle and silly. Kids love the facts themselves: a younger sibling who gets "A cat can jump up to six times its own length" will probably try to measure the family cat. Our cat facts for kids list is a great follow-up, and April Fools pranks for the whole family has more kid-safe ideas.
How do you reveal a sibling prank?
At a family dinner, casually say "Did you know a group of cats is called a clowder?" and watch their face change. If it's a paid plan, end it afterward from the unsubscribe page. If they want revenge, point them to harmless revenge pranks. It's only fair.
Ready to prank your sibling?
Enter their number at catfactstexts.com, pick how many facts a day, and practice your innocent face. For more, see how to do the cat facts prank and roommate pranks, which work great on siblings who share a room.