Led by Steve Ciprani, center left, and Pavithra Nagarajan, right, hundreds of activists march toward the Education Department building in Washington, D.C., on Saturday. (Bill O’Leary / The Washington Post) Nolan, his 10-year-old son, had bragged to his friends when his mom attended the Women’s March after President Donald Trump’s inauguration, and then he had asked his dad when he could …