Here is some more in depth information as well on the types of fuel cells that hopefully will be beneficial in putting his home experiment into context:

Types

High/Low Temperature Fuel Cells
Fuel cells are subdivided in low temperature (LT) and high temperature (HT) fuel cells. LT fuel cells work in a range from room temperature to approx. 120 °C and HT fuel cells from approx. 600 to 1,000 °C. The phosphoric acid fuel cell operates at a temperature in between, at 200 °C.
Electrolytes Used

Fuel cells are usually named according to the electrolyte used. The different electrolytes significantly affect the characteristic properties of the fuel cells like operating temperature and mechanism of conductivity. Directly related to this is the selection of the catalyst, demand of the process gas, etc.

We hope you enjoy this cool video.  Remember, never try these types of experiments without the supervision of a professional!