This blog shows a few regional costumes and where they come from… you could incorporate a discussion of the region as well.
http://thegreengreek.blogspot.com/2009/03/show-and-tell-friday-greek-traditional.html
This web site has descriptions of the costumes and who wore them.
http://www.assumptioncathedral.org/index.cfm?page=Hellenic_Dance_Academy_Costumes
You might think about making small models with traditional dress.
http://www.greece-athens.com/page.php?page_id=204
Photos of people wearing costumes from different regions.
http://www.foresia.com/name/217204.htm
General information about 19 Century dress in Greece.
http://greekhistory.suite101.com/article.cfm/royal_court_dress_and_fashions_in_greece
Other ideas can include…
Making:
Tsarouxia…from card and woolen pompoms
The tasseled cap
Jewellery design .. The flouria on the dress or head dresses.
Instead of colouring in pictures the children could cut out fabric and glue it on a template..
Cardboard puppets with movable head and limbs depicting characters with traditional costume.
Coming soon.