I found some beautiful photos of vintage children's dresses on pinterest recently, here are some of my favourite. This burgundy frock is by Carol Carter from 1945. It has an Annie (the original movie not the remake!) look about it.
As a huge Art Deco and a new Art Nouveau fan, this dress appeals. Its simple, yet beautiful.
This next one is an incredible dress made in 1942 in wartime England. One can only imagine it was patchworker together out of smaller pieces of fabric, not having one larger piece available. The hours and the love that must have gone into this one make it so special.
You can find the links to these dresses on my pinterest page https://www.pinterest.com/lollipopsday/vintage-childrens-clothes/
Have a great evening,