Okay kiddo, let me explain what Little Saigon is. Little Saigon is a neighborhood in some cities in the United States where lots of Vietnamese people live. Imagine a big group of people from Vietnam who moved to America and decided to live in the same place so they can be close to each other and feel more at home. That's Little Saigon!
In Little Saigon, you can find lots of Vietnamese restaurants serving yummy food like pho (pronounced "fuh"), which is a soup with noodles and meat or tofu, and banh mi (pronounced "bun me"), which is a sandwich with meat, vegetables, and bread. You can also find Vietnamese shops that sell things like clothes, jewelry, and decorations.
Even though Little Saigon is in America, it's like a little piece of Vietnam because the people there speak Vietnamese, have traditions from Vietnam, and celebrate Vietnamese holidays. It's a special place where Vietnamese people can keep their culture alive and share it with others.