America is not a “post-racial” society. Young children's innocent actions show that racial divisions still exist.
Infants notice skin color differences as young as six months of age. Toddlers learn to recognize, label, and categorize themselves in racial terms.
Three-year-olds shown pictures of other children usually pick kids of their own race as those they'd befriend. Given cards with pictures of people and asked to sort them any way they chose, 13 percent of six-year-olds sorted by gender, but 68 percent sorted by race.