Naomy Flores is getting pumped up about the chance to race her team’s car in the challenge division of the 61st annual Bucks County Soap Box Derby in Middletown.

The eight-car challenge race is new to the derby this year and will be run as an exhibition. It will feature cars built by students at the Thomas Campus of the Mastery Charter School in Philadelphia.

“We had to be creative and work with (each) other,” Naomy, 17, said Wednesday about her team’s efforts. They built a blue and gray derby car modeled after an old Batmobile. “The instructions were complicated. Everything was difficult to do. We have worked really hard.”

The 50 Mastery students in Nicole Thiemann’s two advanced engineering classes built the eight cars as their big projects for the school year. The school worked it out with Bucks County Soap Box Derby organizers to add the eight-car challenge to this year’s event, Thiemann said. Mastery is the only school to have any students participating in the challenge at the Bucks County event.