Big visible emotions

Kenji Hiranbe has an article at InfoQ about different types of kanban boards (aka visual signal boards) that can be used in Agile software development teams.

What I found most interesting was the concept of niko-niko calendars, a smiley calendar indicating team member moods for each day. I've done this before but as a part of the story wall rather than a separate calendar. I have since proposed using magnetic South Park avatars with different emotional expressions but most of the teams I've encountered have been a bit too serious to be willing to try it out.