Generous (Vivienne)
Caring (Vivienne)
Intelligent (Kelvin)
Helpful (Vivienne)
Inventive
Confident (Kelvin)
Hard Working
Resourceful (Kelvin)
Dedicated (Vivienne)
Creative
Determined (Kelvin)
Understanding
Proud
Persistant
"Sometimes, it was hard for me, when the weather was bad or I wasn't feeling well," Vivienne says.
To help raise money for children like the two boys in the photo, Vivienne started a lemonade stand near her home in Marin County, California.
"But I knew that other kids were having a harder time than I was at that very moment."
'I never let problems get me down."
Last year, Kelvin presented his inventions at the World Maker Faire, in New York City.
Now, at 16, Kelvin runs a radio station in Freetown.
There are many things Kelvin can't afford. He spends nights figuring out how to build those things.
He built a rechargeable battery that provides power for homes in his area.
A small percentage of sales goes to support Vivienne's dream of making the world a better place for all children.
"I want all kids to be able to play," Vivienne, now 10, told TFK. "I want them to be happy."
He made both using items he found in the trash.
He also showed off his handiwork to students and professors at MIT and Harvard University, both located in Cambridge, Massachusetts.
She promised to work every day for a year, rain or shine.
When Kelvin first began tinkering with trash, some people laughed at him. They said he was wasting his time.