Materials Needed:
- A piece of cardboard or thick paper
- A rubber band or string
- A pen or marker
Instructions:
1. Prepare the Cardboard: Cut a rectangular piece of cardboard or thick paper about 3 inches wide and 6 inches long.
2. Make the Knock: On one side of the cardboard, write a prank message or draw a funny picture. This will be the side that faces out when you use the prank knock.
3. Attach the Rubber Band: Cut a piece of rubber band or string about 12 inches long. Tie one end of the rubber band to one corner of the cardboard and the other end to the opposite corner. This will create a tension that will make the prank knock move.
4. Test the Prank Knock: Hold the cardboard in one hand and pull the rubber band with your other hand. The cardboard should vibrate and make a knocking sound. Adjust the tension of the rubber band until you achieve the desired knocking sound.
5. Place the Prank Knock: Once you are satisfied with the sound, place the prank knock on someone's door or a wall in a way that it will be hidden. Ensure the prank message or picture is facing out.
6. Wait and Enjoy: Now, all you have to do is wait for your victim to find and experience the prank knock. Be ready to laugh as they react to the unexpected knock!