The concept of this plate is to show happiness through a series of children doing what they do best and when they are the most happy: playing, singing, dancing, sharing, and laughing.
These icon circles show a series that is happiness enacted, and simultaneously they show that these acts—of companionship, play, sharing, and laughter—all cause happiness. So happiness is both cause and effect.
The images are green, because the best play and the best sharing is done outdoors. It is when we interact with each other while engaging our environment that we find the most happiness.