Kid stuff.

As a feature of Picasa, you can set your computer's screen saver to dredge through your "My Pictures" folder and make a display of random photographs.

A couple of weeks ago, my six-year-old, Tertius*, had paused in the doorway to my office and was watching the stream of unconnected images. "The computer's dreaming," he pronounced.

*I won't be using my kids' real names on the blog, not to protect the innocent, because they aren't, but to spare their embarrassment. I'm saving all that for their teenage years.