At home for 5-11 11-14
What you need
- Fold a small piece of paper three times so you have a concertina
- Cut two slits into the middle ridge
- Hold the paper up to your mouth and blow
Results and Explanation
The high-pitched sound you hear is created by the paper vibrating.
These experiments have not been specifically safety tested for home use but we believe them to be safe if the instructions are followed. Adult supervision or direction is recommended as appropriate. All experiments are carried out at your own risk.