These are so easy!

A couple of ladies and I held a stall in the community a couple of months ago
and sold a few different bits and pieces. I wanted to whip up some kids
clothes and I found this shirred fabric at Spotlight by the metre.

Just cut enough for a dress sew up the side, cut a strip off the
bottom to use as straps at the top and hem the bottom. Walla!!!!

Just one hint, the bottom tends to be a little straight with not a lot
of movement room so get a little extra fabric and from the
elastic down cut out in a triangle shape or bell shape, so there is
more width for movement. This came in an array of colours
and was very popular with the little girls.