non-sensical

Davin: Mom, have you seen Grammy's old camera?
Me: You mean the really BIG one?
Davin: Yeah, it looks like yours, but it is way bigger and heavier.
Me: Yeah, I know the one...It is really old.
Davin: (Pause) So do cameras get bigger as they grow older?
Me: (no response, just laughing)
Davin: (laughing once he realized what he had asked)

End of conversation.