I never realized how little I understood race until I tried to explain it to my 5-year-old son. Our family story doesn’t seem too complicated: I’m Chinese-American and my husband is white, an American of English-Dutch-Irish descent; we have two children. My 5-year-old knows my parents were born in China, and that I speak Cantonese sometimes. He has been to Hong Kong and Guangzhou to visit his gung-gung, my father. But when I asked him the other day if he was Chinese, he said no.

You’re Chinese, but I’m not,” he told me, with certainty. “But I eat Chinese food.” This gave me pause. How could I tell him that I wasn’t talking about food or cultural heritage or where we were born? (Me, I’m from Queens.) I had no basis to describe race to him other than the one I’d taken pains to avoid: how we look and how other people treat us as a result.

Read more in The New York Times Magazine.