Last week I attended the Maryland Science Teacher Conference as an exhibitor promoting the second edition of my lab manual. I used most of the table to display activities from the manual. The display that got the most attention was the "homemade" fuel cell that was being used to run a digital watch. It consisted of platinum coated nickel electrodes in a semi-solid aqueous solution consisting of agar, water, and sodium sulfate. The bubbles sticking to the electrodes produced enough current to run a digital watch between charges. It was modified from this procedure from the Scitoys company. A few visitors took pictures. If anyone who took pictures visits this website, please send me a copy so I can display it here.