This is a sweet story that takes place in London in the 1930's. It was first published in 1937, but I hadn't heard of it until Betsy mentioned it.
I enjoyed reading it. It is about three orphaned sisters who start at a ballet school. I liked the nice flowy writing style. The characters are cute, if stereotypes. It is a little bit like a fairy tale.
I would think elementary school girls would especially like it.