Alan's 7th grade project

For Alan's 7th grade project he had to do a science project and create a powerpoint presentation for it. He had to demonstrate that he understood the Scientific Method. He did a lot of research, and was going to do something with an egg rotting.... not really sure what he had in mind there.... but anyway, ....he finally decided to make a fruit battery.  He's always been intrigued with robotics and electronics and things like that. (I'm not surprised, my Grandpa was an electrician, and maybe Alan will follow in his footsteps. I would love that.)
Here's a few pics from the project:

 

Here are the supplies; fruit, copper pennies, zinc washers (you can also use nails), alligator clips, wire, wire cutters, wire connectors (male only)and a multimeter to read the voltage produced

 Here he is preparing the wires.

 Now preparing the lemon to get the juices flowing.

 This is a single cell battery, or a voltaic battery, it produces about .9 volts of electricity.

 Here he is attaching multiple "batteries" and checking how much electricity they produce.

 And here is a tiny 3 volt LED light that he powered with fruit!!

 Here he is sharing his project: