Botany

Sawyer declared, during a van ride, that he wanted to be a scientist.

I explained that anyone who studies science (at any age) is a scientist.

He said he likes chemistry but wants to study "the earth".

We had been discussing poison ivy. He wants to see the real thing.

So, I explained that the study of plants is called botany and the person who studies botany is a botanist.

He said, "Then I want to be a botanist."

Well, okay then.