Watch that Sound
Sound can be seen in the form of vibrations caused by the sound waves. Here you can use the sense of sight to experience the sense of sound. People who are deaf can feel music when they touch the music system speaker and feel the vibrations. This happens because the sound waves vibrate the particles in the air through which they travel.
Once again here is a science experiment with which you can experience the sound vibrations in action. For this experiment you will need a plastic bottle with its bottom cut out. Cover the cut opening with a plastic bag and hold it in place with a rubber band. This will give you a sort or bottle drum.
Now light a candle and make sure there is no fan on to make the flame move. point the open neck of the bottle drum at the candle and tap the drum end of the bottle with your fingers. You will see that the flame will begin to dance with the vibrations of the air particles which were trapped in the bottle and moved out thanks to the drumming.
If you drum hard enough the flame will be put out as the air will rush out in a fast movement much like how you would blow out the candle with your own breath. If you found this experiment fun to do you may want to try out some more. Check out the science fair project ideas here.