Madeline Blakemore prepares to catch a car after it crosses the finish line during the Maine Junior Solar Sprint state finals at the Owls Head Transportation Museum on Saturday. Gregory Rec/Staff Photographer

Middle school students watch as their cars take off from the starting line during an early heat of the Maine Junior Solar Spring state finals at the Owls Head Transportation Museum on Saturday. Gregory Rec/Staff Photographer

Ben Marquis of Kennebunk, right, and other middle school students get ready to release their solar race cars at the starting line in an early heat of the Maine Junior Solar Sprint at the Owls Head Transportation Museum in Owls Head on Saturday, June 6, 2015. Gregory Rec/Staff Photographer

Lauren Boubel, an eighth grader at Bath Middle School, reacts as her team's car crosses the finish line first in a heat that would advance the team to the final race at the Maine Junior Solar Spring state finals at the Owls Head Transportation Museum on Saturday. Gregory Rec/Staff Photographer

Abbie Baker, left, and Lauren Boubel, eighth graders at Bath Middle School, make adjustments to their solar race car before the start of a race heat at the Maine Junior Solar Sprint state finals at the Owls Head Transportation Museum on Saturday, Gregory Rec/Staff Photographer

Volunteer John Burrell inspects a solar race car before the start of the Maine Junior Solar Sprint state finals at the Owls Head Transportation Museum on Saturday, Gregory Rec/Staff Photographer

Christopher Fortin, a sixth grader at the Middle School of the Kennebunks, makes adjustments to the rear axle of his solar race car before the start of the Maine Junior Solar Spring state finals at the Owls Head Transportation Museum on Saturday, Gregory Rec/Staff Photographer

With cardboard covering the photovoltaic panel of his race car, Thomas Johnson, a sixth grader at the Middle School of the Kennebunks, looks up to the sky to see if any clouds are about to obscure the sun before the start of a race at the Maine Junior Solar Sprint state finals at the Owls Head Transportation Museum on Saturday. Gregory Rec/Staff Photographer

Caitlyn McLellan, a student at Gorham Middle School, adjust the rubber band that transfers power from a small motor to the drive axle of her solar car just before the start of a race at the Maine Junior Solar Spring state finals at the Owls Head Transportation Museum on Saturday. Gregory Rec/Staff Photographer