Blue Sky Thinking

It is funny how life works. Today I have been having most extravagant thoughts. I took this photo for my Blip and thought I would call it Blue Sky Thinking, in a very absent minded way as I don't actually know what it means. So I googled it, and it means: "thinking that is not grounded or in touch in the realities of the present; open-minded thinking (i.e., as wide and clear as the blue sky)."
Just precisely what has been going on in my head today!