We wanted to see if fruits and vegetables can generate energy and run a little clock. We used potatoes, grapefruits, cucumbers, and cantaloupe. We tested all of them. We used a little clock and some insulated copper wire. We discovered that when you put in the zinc and brass tabs it makes the clock work but if you take out even one tab the clock stops. We tested all of the fruits and vegetables and after all of the tests the cantaloupe came out on top both times then coming in second was the grapefruit followed by the potato and in last was the cucumber. They all ran the clock. Our hypothesis said that the grapefruit will last the longest because of the acid. We proved our hypothesis wrong we also found out that the acid has nothing to do with how long the clock lasts. We found out the clock is ran by electrolytes. Fruits and vegetables have electrolytes in them but only enough to run small things. These fruits and vegetables are what you call electro chemical batteries. The electrolytes get transferred through the copper wire until they are converted into electric energy then they are forced into the clock