Lemon Battery Project  Electricity for kids and grownups alike!
Making a lemon battery is one of the classic science projects
for kids. It is inexpensive, easy to set up and fairly easy to
perform.  If you take a quick peek at the supplies photo below,
you'll see we need a voltmeter. Don't let that scare you. A
fruit battery doesn't generate enough power to actually light a
bulb, so a meter is needed to see the effect. That's why I
believe this is better suited as a 5th grade science project, if
done by itself. However, nothing is hard and fast here. If you
want to combine this with the "Turning on a Light Bulb"
experiment to bridge the gap between lighting a bulb and seeing
the meter move, it could be made to fit elementary science
projects from about first grade on.  Enough of the intro stuff
... let's create a lemon battery - and then try to figure out
how it works. Have fun!   What could be more everyday than a
lemon, a couple of nails and some wire? Well, that's all you
need to make a lemon battery. As