Ow does play enhance childrens cognitive development in the Foundation Stage

Criteria for this dissertation will be attached. I would also like you to include primary research as well as secondary research. Using two settings: to observe how children in the Foundation stage use play for learning. The aim is to find out how play is used in the Foundation stage. Also include theorists in this dissertation such as piaget, vygotsky, howard gardner and any others that are relevant to my topic.

PS I will need the persons email who will be working on my dissertation in order to send attachments and further information.
Books and journals to be used for this dissertation will be attached. I will find some more journals to be included.
Only do a reference list not a bibliography. I will send a attachment on how to reference these books,journals.