A Sacajawea Elementary student gets a kick out of looking at a magnified friend through a Fresnel lens. The lens demonstration was part of the Pacific Science Center's Science on Wheels program which brings interactive exhibits to schools across the state. The Fresnel lens was originally developed for use in lighthouses in 1823. Today, aircraft carriers use Fresnel lenses in their optical landing systems. New applications have also appeared in solar energy where Fresnel lenses are used to concentrate sunlight onto solar cells.