First sentence

We were playing with his blocks two days ago and he said "Here, I'll show you" as he picked up a piece and connected it to another. At least, I'm pretty sure that's what he said. I tried to get him to repeat it, but he wouldn't. First sentence or product of my fertile imagination? Don't know. Jon is positive it's the latter but what does he know? I think he's just jealous because he had a dream when Dex was just a wee baby that the first sentence Dex said was "I'm wearing blue."