Do a group art project. Get out drawing paper and crayons or paints and have each person draw something associated with a specific theme (a season, an emotion, or a current event, for example).
Create a mural together on the same paper. For added stimulation, try holding the crayon or paintbrush with your feet instead of your hands.
Art is a medium for activating the nonverbal and emotional parts of the cerebral cortex. When you create art, you draw on parts of your brain interested in forms, colors, and textures, as well as thought processes very different from the logical, linear thinking that occupies most of your waking hours.