This is probably the easiest dress I have ever made - it is quite simply just a vest and a large rectangle of cotton shirting that I had in my stash sewn together with a waist length piece of elastic to give it shape and gather it together.
The idea was not my own however - it was devised by the lovely Hattie of the Little Red Roost blog, although mine differs slightly from hers because I didn't apply a frill around the neckline and straps as she did.
AND - because you can pick up vests like mine for around £3 in H&M, this dress will cost you next to nothing and can be used with any light to medium weight fabric!