We have embarked on a short science unit about ENERGY. "Heat" energy was the focus one day last week.
To illustrate the energy that HEAT has and gives off, we headed downstairs to the "man cave" where the Hubs keeps a small space heater. The kids gathered 'round with tissue paper in hands. I flipped on the heater and we waited a few moments for the heat to begin dispersing.
The Littles each took turns placing their tissue paper over (but, NOT on...for obvious fire safety reasons) the heat. As I had predicted, each of the sheets of tissue began to slowly rise or move as hot air pushed up on them. It was a physical showing of heat "rising" and displacing cold air.