WILLMAR - Children experimented with the power of science during the 4-H on Wheels Superhero Science program Monday at the Willmar Public Library in Willmar. Through a Batman game, attendees learned about biomimicry, which is a concept that engineers use to design innovative products by imitating nature. They also created a lightning jar, which showed how energy forms when a cold air system and a warm air system meet to create a spark. The six-week-long program meets every Monday and is in partnership with Kandiyohi County 4-H and the University of Minnesota Extension. The lessons aim to encourage youth to explore their environment through hands-on experiences.