Caillou often says "no" but sometimes he really means "yes". Caillou has entered the "no" stage of development. Says No! is the exploration of that phase as Caillou explores his independence and his growing sense of free will. In this series, children will go "hand in hand" with Caillou to navigate their way successfully through various key developmental experiences of childhood. These books are not merely descriptions of daily life; they adopt Caillou's viewpoint as each book strives to communicate directly with children at their level.