Description: Engine is run by changes in air pressure due to temperature difference
Instructions: Place on palm of hand to start, place ice cubes or cup of ice water to reverse direction. Please do not use the hotplate; this may melt the styrofoam plunger, and thus ruin the engine.
Items Used: Small stirling engine, hot plate, ice, water cup
Notes: Treat with care, place under document camera for large audience. Math Description: None.