While working out some of the details of another project I wanted to put my new spark core to good use. I have a young son and wanted him to have some indication of when I am nearly home after a day at work so came up with the idea of the "daddy flag". I used a pair of servos I had lying around and a length of dowling from a mobile to make a small flag pole which has two dimensions of movement. I programmed a couple of functions in the spark core to raise it with a flourish and to lower it and then set up IFTTT recipes on my iPhone to trigger them when I left the house and returned. Whole thing took a couple of hours. Since doing thing I am now considering expanding it to a clock with multiple locations like the magic clock the weasleys have in Harry Potter.