Esther Wojcicki, author of 'How to Raise Successful People'

Fifth graders listen to industrial tech teacher David Olson demonstrate how an LED light can be lit using voltage generated by different fruits in November 2013 at Falls High School in International Falls, Minn.
Derek Montgomery for MPR News file
Go Deeper.
Create an account or log in to save stories.
Like this?
Thanks for liking this story! We have added it to a list of your favorite stories.