Lafayette Elementary third-grader Alexander Sales expresses excitement about his Lemon Battery Experiment: "It actually lit! Wow!" Photo courtesy Maryanne McCormick Over 1,400 K-5 students ...

One of the classics is the lemon battery. [iqless] decided to have a play with the idea, and whipped up a little something for his students. The basic lemon battery is remarkably simple.

It’s so sensitive the output of a lemon battery is off the scale, all from a time earlier than the two dinosaurs showing this tech off. Neat stuff. One last thing. Because [Bil] and [Fran] are ...