For the teacher, selected videos are provided to assist with the activity:

• How Batteries Work by TED-Ed: https://www.youtube.com/watch?v=9OVtk6G2TnQ
• How to Make a Lemon Battery by SciShow: https://www.youtube.com/watch?v=GhbuhT1GDpI (3:21-min; video about fruit batteries)
• Projector and computer to show the YouTube videos on battery technology

Each group needs:

• two or three different types of fruits, such as a lemon, orange, grapefruit or a vegetables, such as, a potato, cucumber (or a pickle), or onion
• penny or copper strip
• galvanized zinc nail or screw
• folded strip of aluminum foil
• 3 wires with alligator clips attached
• 2 coated electrical wires
• disposable gloves (1 pair per student)
• Student Lab Handout

In addition to the materials listed above, students should have access to the following items either at their group table or in a centralized location in the classroom:

• multimeter
• ruler
• LED bulbs
• calculators
• breadboard (optional)
• cleaning materials (such as cleaning cloths or paper towels)