During the early years of life, children move from sensory or behavioral responses to symbolic or representational knowledge. For example, young children are able to navigate their homes and other familiar settings by recall and sensory cues, but later they come to understand and can use abstractions such as left and right or read a map of the house. It is around age 2 that children begin to represent and reconstruct their experiences and knowledge.94 For example, children may use one object to stand for another in play, such as a block for a phone or a spatula for a guitar.95 Their ability to use various modes and media to convey their meaning increases in range and scope. By the preschool years, these modes may include oral language, gestures and body movement, visual arts (drawing, painting, sculpting), construction, dramatic play, and writing. Their efforts to represent their ideas and concepts in any of these modes enhance the knowledge itself.