You know you love noisemakers! The cup acts as an amplifier for the vibrations you make with a wet paper towel and string making it sound sort of like a chicken!
I had seen this done before but found and verified the instructions from Science Bob!
All you need is a plastic cup, about 18-20″ of cotton string (or yarn), a paper clip and a paper towel.
An adult can punch a hole in the cup with a nail or other sharp object.
Put your string through the hole making sure not to pull it all the way through.
Tie a paper clilp to the top to keep the string from falling through.
To make your noises fold a small square of paper towel and get it a little wet (not dripping wet so you can wring it out if you get too much water on it) Pull the paper towel down around the string in short strong bursts.
You can play with different cups to see if it changes your sound! Have fun!