"Say What?"

The other day we were at my sister's house and she was having her car repaired by a Hispanic man. Once he got done he came to the door and explained to my sister what was wrong with it and what needed to be done. During the course of the conversation, Zion was at my sister's knee listening and looking up into the guy's face. When he was done explaining and waiting on my sister's response, Zion said "Say What?". We all rolled in laughter and the entire time we were laughing, he was looking at us like. "What?"