I'm just doing this assignment too and that's been a great help. I feel like I've been ploughing through Google for hours trying to find info on theories - I didn't have the guidance bit about exactly who to research!
I have included a bit on Reggio and EYFS (obviously!) and made a list of the potential benefits of creativity, but without actually crediting them to any particular theory, so I'll do some research on those theorists to back that up.
This is quite a good link too:
http://www.handsonscotland.co.uk/flo..._of_creativity
and this:
http://www.ncb.org.uk/media/77667/play_creativity.pdf
and this:
http://www.nfer.ac.uk/nfer/publications/55502/55502.pdf
Thanks for your help Ruthierhyme! x