Star-gazer

We were coming home late the other night, and it was a rare, clear night...the stars were amazing! I was pointing out the sky to Andrew, and he agreed with me that they were beautiful. And then he pointedly asked,

But mom, where are the lines?

I don't know how I instantly knew what he was talking about, since we haven't spent any time looking at pictures of constellations, but he was looking for the lines to connect the stars in the constellation pictures! I'm still not sure if my explanation on that one made any sense...