In a nutshell, a fuel cell is a device that takes gaseous hydrogen and converts it into electricity. This electricity can then be used to power anything that is normally powered by electricity, like cars with electric motors, ice cream makers, etc.
Watch the excellent one-minute video at the bottom of this post to learn how a fuel cell works.
In 1998, my eldest daughter Nicole and several of her 8th grade classmates received a Dept of Energy (DOE) grant to build a hydrogen fuel cell.
They contracted Schatz Energy Lab at Humboldt State University to design and build the 15-cell fuel cell for Merit Academy.
The students gave fuel cell demonstrations at universities and conventions in 1999 and then Nicole continued to promote hydrogen fuel cells for the next 4 years: