Children at this level use words and symbols such as pictures and objects to communicate and develop their own ideas. They can form mental images of their desires. For instance, they picture the cookie they are craving-what it looks and tastes like-then use their words to demand, "Cookie!" They enjoy make-believe play, such as using a spoon to "feed" a stuffed bear. Blocks that previously were simply for stacking now can be arranged to become a house for their toy animals.