Can a blueberry make electricity? Have your students find out by building their own solar cells using berry juice. This activity can be geared towards middle or high school students and meets NGSS standards. Topics that can be covered include photosynthesis, chemical reactions, and changes in energy. The activity can also be extended by having the students look at how a variable affects the power produced by the solar cell.
A presentation to go along with the solar cell activity is located here:
Glass stirring rod
Blackberries, raspberry, or blueberries (do not use strawberries)