Paint a picture using just water then watch it slowly evaporate, leaving you with a clean slate.
Simply paint on the surface with water and watch your thoughts come alive. As the water slowly evaporates, your creation fades, leaving the board clean and ready for new ideas.
Based on the Zen idea of living in the moment. Includes brush; just add water; have a moment of Zen anywhere. "Magical" board records your thoughts before "freeing" them into the world.