Class Waves - Heat flow

I had the class do this to keep them on their toes and create a 'physical image' of the concept of how heat travels.
1) Do a wave from one end to another.Try out by starting from different sides(front, back, left right). Just get the pupils to stand quickly and sit down.
2) Then introduce a heat source such as a light bulb. Inform them that they are to do the wave starting from where you place the heat source. (If you can't get one, just make yourself the sun!)
3) Introduce pupils to how heat travels in waves through matter (solid), from a hotter area to a colder area. Tell them that they represent the molecules in a solid, the heat flows from a hotter region to a colder one.

You can continue to use this to highlight the flow of heat through good and poor conductors!

Have fun!