If you've ever worried about your gas mileage, hundreds of kids, gathered in Houston, may be able to put some of those concerns to rest.
The Shell Eco-Marathon, at the George R. Brown convention center, is a challenge to design, build and drive the most energy efficient vehicle possible.
More than a hundred high school and college teams, from across the Americas, have come to compete.
Last year's winner traveled nearly 2200 miles on a gallon of gas.
"This gives us an opportunity to get young people involved," says Shell's Ignacio Gonzalez. "To give them a platform where they can have a project that allows them to know what it's like to be technical; to be an engineer; and just get inspired."
Competition on the track, begins Saturday and continues through the weekend. It is free and open to the public.