Duck In A Cup

Materials:

• Plastic cup
• String
• Wet paper towels
• Drill or tool to punch a hole in the bottom of the cup
• Paper clip

Instructions:

1. Drill or punch a hole in the center of the bottom of the cup. The hole needs to be big enough to put the string through.
2. Tie one end of the string to the paper clip.
3. Push the other end of the string through the hole in the bottom of the cup. The paper clip will stop the string from pulling all the way through.
4. Hold your Duck In A Cup in one hand. This will allow the string to dangle beneath the cup.
5. Wrap the wet paper towel around the string and pull down firmly in sharp little movements.
6. Your Duck In A Cup should start quaking!

How it Works:

The string vibrates as you pull the wet paper towel down. While these vibrations are usually almost undetectable, the cup amplifies the sound making a loud and distinct duck quaking sound. 

Make This A Science Project:

What happens if you use a different sized cup? What happens if you use a different length of string? What happens if you use a different type of string? 

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