Science?

Last night Ethan was sitting at the breakfast bar, finishing his dinner. Zach was sitting next to him. I was loading the dishwasher.

Ethan: Mom! We did science in school today!

Mom: Wow! Science! What did you do?

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Ethan: Science.

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Me: Yes. I know. You said science. But what kind of science did you do. Did you do a project or activity or something?

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Ethan: I don't know.

Zach, still chewing his food, turns and looks at him.

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Me: You don't know what you did?

Ethan: No. I don't remember.

Me: Then... how do you know you did science?

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Apparently that was a stumper...

Ethan: Mom. We did science. That's all I knowed.

Zach looks at me - smirking.

Zach: He's a bright one... isn't he?