SCIENCE EXPERIMENTS FOR KIDS
Have you ever heard of a cup that laughs? Hear chuckles, guffaws, and great belly laughs when you create a laughing cup.
This activity will show you how it can happen – and why!
Grade level: pre-school and older, with help from a parent for the scissors portion
- Paper cup
- Paper clip
- A small amount of water in a bowl
THEN DO THIS:
- Tie about two feet of string to a paper clip (make sure to tie a tight knot!).
- Poke a small hole in the bottom of the cup with the tip of a pencil.
- Thread the string through the hole in the bottom of the cup.
- Before you use water to play with your laughing cup, see what happens without water.
- First, hold the string taught and pull your fingers along the string. What sound do you hear? Do you hear anything at all?
- Now, try out your laughing cup with the water.
- Dip the string all the way into the bowl of water (make sure to saturate the string).
- Holding the string taut, pull your fingers along the string a little at a time to make laughing noises.
WHAT IS HAPPENING?
Your fingers create a vibration on the string, which is amplified through the cup to create the sounds. You can play with different-sized cups to create a variety of sounds. Next, try using a coffee or soup can to see what kinds of sounds you can make. Have fun and try it out!