Four toddlers are walking on contact paper, sticky side up, taped to the floor. Experiences such as this are often referred to as “sensorial play” and justified with phrases like, “they are exploring their sense of touch.” The implication is that the children are learning which objects are smooth, rough, sticky, and which objects are not. Emphasis on a refinement of the sense, in this case touch, seldom reveals the strategies children use to make these distinctions and seldom reveals the extensions the children make once an attribute, such as adhesiveness, is discovered. It is typical, even for one-year-old children, to enter the world of invention, reasoning, inferring, figuring things out, and “what if “ games.