Think of Adrienne Segur (1901 to 1981), a French illustrator about whom very little seems to have been written, but whose work is popular all over the internet. And, depending on your age, maybe between 40-60, you may very well know Adrienne Segur's illustrations from The Golden Book of Fairy Tales, the cover of which is the first illustration here. It may be one of my favorite book covers of all time.
Segur's work, I think, lends itself best to young children's books, and I think her art would be perfect for a little girl's bedroom. You can find a huge range of her work at Art Passions--a site replete with fairy tale and Pre-Raphaelite images. You can also link to some gorgeous prints to buy there. In any case, if you love art, you should visit Art Passions, and if you want to be swept back to childhood, check Segur's work.
In order, the images are The Golden Book of Fairy Tales cover, "Baba Yaga's Cat," "The Ugly Duckling," "Sleeping Beauty," and "Puss in Boots."