What's that, Daddy?

Riley seems to have entered a new stage in his development. His new catch phrase is "What's that, daddy?" He'll sit on my lap or stand next to me, and ask that of anything picture or video he doesn't recognize (and those that he does). Yesterday we spent quite a while looking at dolphins, penguins, lions, dogs, cats, etc. I happened to be looking at a string of pictures of radio telescopes, and I must have told him "that's a picture of a telescope" about 10 times in a row. It reminds me of when Megan and I used to sit and surf for pictures of lions while we ate breakfast in the morning.