Will An Apple Make Electricity?

Yes it Can! I tried it at school for my science fair and it actually worked.You don't specifically need an apple , it can work with any fruit , but gains more energy from an apple. So an Apple is the best choice
Materials, [ what you need] :
Copper
Zinc
LED
Apple
you need to stick into fruit Copper and
Zinc electrode. Attach wires to each electrode and then you can check electricity using light bulb or multimeter.
If you need any information , go to the following  sites  :

nacaome.tripod.com
chemistry.about.com
www.kidslovekits.com