In the developmental Psychology, there are the tendencies to make assessments on the differences between the young and the grown human being in terms of experience, knowledge and thinking, and many aspects that treat the said issue.
They said Cognitive development is the growth of skills used by infants and children to understand and interact with the world around them. (Cognitive and Social Development of Children's with HoloProsencephaly).
On this note, the children's' since early childhood would be thought about many things based on their ability to understand. For example seeing image and able to remember it at any moment. Additionally, when the child continues to grow would also know the uses and value and the ill effect of any object shows to them. For example, a child would know what the uses of a lamp; while at the same time would be thought that it is very dangerous for him or her to put hands on the open flame of a lamp.
Children start learning about sounds when they are still in the womb. Over the first year, this attention towards sounds and particularly voices develops into an understanding of specific words and phrases. We can assess children's understanding of language by looking at 2 their reactions to familiar words and their ability to follow instructions. The ability to understand language
begins well before children begin to speak their first words ...