Jusrassic Lies

Colin has a keen interest in Paleontology lately, which I certainly encourage. However, at times it does stretch the limits of my knowledge and my patience.

I'm in the middle of some household chore or another, where I can't get to a computer easily, and he starts pestering me.

Colin: What period did the dinosaurs live in?
Me: Jurassic (I'm just guessing here. I hope I'm right.)
Colin: What period are we in now?
Me: Um... the Modern period.
Colin: Yeah, but what is it called?
Me: That is what it's called. (Oh, God! He's getting too smart for me.)
Colin: What period is the very first period?
Me: Um... (I have no clue)... the Thoracic (Thank heavens he can't read yet.)
Colin: What was the Cretaceous period?
Me: Er... that's when lobsters were invented.
Colin: When did life begin?
Me: During the uh, Triaminic period (sounds good to me)

How did a five year old get too smart for me?