The energy from a series of zinc and copper electrodes through five oranges is used to charge a capacitor, which is then used to light a flash bulb.
Oranges conduct electricity.
The spontaneous flow of electrons from zinc to copper is electricity and can be used to do some work. Clean electodes with sand paper. Set oranges in coffee cups to collect juice and minimize mess. Set cups with oranges in the Apparatus. Insert flash bulb in its holder in the apparatus above the oranges.