Does the how matter? Play is one of the first activities that children learn in the development process. Is it important? Play is very important for a child's development. Surely most people agree that playing is important, but even today psychologists are conducting research to see what is the best way for children to learn. On one side of the spectrum are those who argue that screens don't help children learn. On the other side there are those who strongly agree that screens are the best way for a child to acquire knowledge. Many developmental theories provide evidence for the best way a child might learn in the earliest years of development. Piaget's theory of cognitive development and Piaget's four stages of cognitive development are: sensorimotor, which runs from birth to age two; Preoperative from the age of two until approximately the age of seven. The concrete operational phase is from seven to eleven years old and, finally, the formal operational phase which starts at eleven and goes up to Culture has a great influence on the development of the child. There are different ways in which cultural context organizes cognitive development: culture often defines which cognitive activities are valued, for example some cultures may emphasize reading, while others may prefer children to learn science. Culture is also responsible for providing tools that shape children's ways of thinking: some cultures provide the abacus for solving mathematical problems, others provide pen and pencil, and still others provide calculators. It all depends on the resources that culture can provide to the child. Furthermore, high-level cultural practices help children organize their knowledge and communicate it to others. Some cultures promote children to work alone in school, other cultures promote group work. Vygotsky and other sociocultural theorists argue that intersubjectivity is the social nature of cognitive development. Intersubjectivity is when participants in an activity share their understanding with each other. For example, if a group of children is trying to put some blocks together to build a house, they should share their understanding of the goal of the activity and the role each of them will play. Sharing their understanding would allow them to work together in a complementary way. Guided participation is