Instead of brochures on lunch programs or sports teams, volunteers distributed packets and flyers on how to fight government tyranny. At one booth, a woman passed out homeschooling curriculum packets, which included a guide to the libertarian children’s book “The Tuttle Twins Learn About the Law.” A woman in the crowd wore a black tank top that read “Just a Regular Mom Trying Not to Raise Liberals.” A bed sheet banner declared: “THIS IS THE NEW CIVIL RIGHTS MOVEMENT.”