Employing the same skills he uses in his work at NASA, Evan Thomas, a volunteer working with Engineers Without Borders, designs water recovery and purification systems for use in the arid country of Rwanda.
The teams design hand-powered, peanut butter making machines for a women's collective in Haiti. Watch now.
An 11-foot tall water slide is no fun without water. See which team's water-pump invention makes the biggest splash. Watch now.
Build a machine out of cardboard.
Enter our design contest and win big!