Big idea: Sound travels through solids, liquids and gasses as a wave.
Candle demonstration show how sound energy moves from the source of the drum through the air and over the flames, causing the flames to move.
The air itself is not moving, it is the compression, expansion,compression, expansion and so on of the air particle by the sound wave that causes the flames to move.
What connections can you make to "feeling" sound energy to Helen Keller or other things?