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Here are three easy ways to say that idea for a 6-year-old:

  1. Smell happens when tiny bits from things float into your nose and tickle nerves that tell your brain what you are smelling.
  2. When little particles from food or flowers get to your nose, they touch special nerves and send a message to your brain — that is how we smell.
  3. Smell is when tiny pieces in the air reach your nose, tickle nerve endings, and then those nerves tell your brain what the smell is.

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