Happiness is catching all three children playing quietly together.
Although, literally 20 seconds after the shutter closed on the camera, someone hit someone else, and a toy was thrown at one's head. Screaming ensued, and all were sent to their rooms. Being that they don't listen, they instead spread out to different areas of the living room, crying and wailing about their mean mommy who took away the fairy treehouse for no particular reason at all.
Such is life. ;)