: My 9 yr old son has signed up to do a science report on batteries.  I was
: wondering if anyone could provide me with some information as to how to
: construct a home-built battery.  In my grade school days, I remember seeing
: the 'ice cube tray' version, but I don't remember what to use as a good
: electrolyte or what the easily obtainable metals were.  
: 
: Thank you in advance.
 
I remember watching a whole "Mr. Wizzard" program on this subject when
I was a kid.  The battery constructed on the program which made the 
biggest impression on me, and generated the most power, was made using
a galvanized bucket (for the zinc) and a copper toilet tank float.  The
electrolyte was sauerkraut!
