Renewable Energy: Thermal Power Kit 

Now you can generate electricity using nothing more than a combination of hot and cold water and a special conversion cell. As the temperature evens out between the two containers of water, the power level reduces. LED and mini turbines demonstrate the variance in the electrical power being generated and there are two thermometers to keep track of the temperature levels.

• Discover the thermoelectric effect and the materials that cause it while performing experiments with a unique generator.
• Create an electric current using nothing more than temperature differences while investigating physics concepts.

What is the central component of the generator? With what physical effect does it function? Quote another thermoelectric effect.

The central component is a Peltier Module. It works due to SEEBECK effect, which is the complementary effect of PELTIER effect.