This is a helpful resource about talking with children about race. While some adults are hesitant to talk about race with children, especially white adults to their white children, children of color typically begin experiencing racist harassment at very young ages. And, studies repeatedly show that children as young as three begin to mirror the ideas about race that they observe. 

Read this article about best practices for talking about race with kids: https://www.embracerace.org/resources/your-5-year-old-is-already-racially-biased-heres-what-you-can-do-about-it