Carefully remove about 1 cm of the insulation from the leads on the holiday light. Do not cut into the wire beneath the insulation. Twist one end of the wire around one screw and the other end around the other screw. Investigate the probability of using other fruits and vegetables to make electricity. If you have a multimeter, you can measure the voltage and current produced.
Batteries are an important part of today's highly charged electrical society.
They are used to start cars, power alarm systems, and run important stuff like radios and CD players. You can buy this resource on CD-ROM for use on computers without internet access.