Five-year-old Rajon is playing with his baby sister, Andrea. He takes Andrea’s teddy bear and hides it behind a pillow while she watches. Andrea quickly finds the bear. Then Rajon puts teddy in a bag, dumps teddy behind a chair, and then brings out the empty bag. Andrea looks inside the bag, is surprised when it’s not there but doesn't look for teddy behind the chair. According to Piaget, Andrea