Each group needs:

• 1 indium tin oxide/titanium dioxide-coated plate; possible sources include the Dutch company Man Solar at http://www.mansolar.nl/.
• 1 uncoated glass plate, available in kit from mansolar.com
• 1 pencil
• 1 paper clip
• 2 alligator clips with wire leads
• a light source, such as a microscope lamp
• a device to power, such as a calculator, musical greeting card or small motor

To share with the entire class:

• 10 mL anthocyanin dye from black cherry concentrate, available online at amazon.com, newegg.com, or buy.com
• 1 Petri dish
• 10 mL iodine in potassium iodide electrolyte solution; put in small dropper bottle
• 1 small (<20mL-size) dropper bottle
• ethanol, to rinse glass plates to remove dye