You are playing with your baby sister and you hide her favorite toy under a pillow and she crawls to the pillow and tries to get it. by doing this, according to piaget, she has acquired:

Object permanence

Object permanence is a skill that children acquire during 0-24 months of age. Object permanence occurs in the Sensorimotor Stage of  Development (one of the four stages in Jean Piaget's theory of cognitive development). Object permanence refers to the knowledge that an object still exists, even once it is hidden. Object permanence requires the ability to form mental representations of objects. 

When your baby sister knows that her toy is still there even though you have hidden it under a pillow, she possesses object permanence. 

Early 18th century british industries were generally small scale and relatively unsophisticated. most textile production, for example, was centred on small workshops or in the homes of spinners, weavers and dyers: a literal ‘cottage industry’ that involved thousands of individual manufacturers. such small-scale production was also a feature of most other industries, with different regions specialising in different products: metal production in the midlands, for example, and coal mining in the north-east.two illustrations of 18t