My group met in class, and we brainstormed about three possible experiments.
Idea #1: Generate Chemical Energy from Animal Waste
This could be shown by burning animal waste to produce heat and light.
Idea #2: Demonstrate Movement of Thermal Energy
This could be demonstrated by inflating a balloon in water when changing the temperature of the water. An example from YouTube is below.
Idea #3: Demonstrate Hydroelectric Energy
This could be demonstrated by having a waterwheel, and using water to make it turn and generate electricity. Here is an example of one built in a basement and displayed in a back yard.