Played much like word association, but with pictures. It can head in any (relatively clean) direction, so it may flow from a car seat, to a couch, to a....
No pictures that are intended to embarrass or humiliate a person or group of people.
Based on the last picture post in the thread, you add another post with an embedded picture that is related in some way. You should embed the picture using the little picture icon (looks like a mountain), don't just link to it. Also, use the preview feature before saving to make sure the picture actually displays and is not blocked.