Make a battery with pennies, nickels, salt, and vinegar in this fun science experiment! This type of battery is also called a voltaic pile. You can use a multimeter to measure the voltage and current produced by your battery, and even use it to light up an LED. Written instructions for this project are available on the Science Buddies website: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Energy_p015/energy-power/make-a-battery-from-coins.