Kadokawa announced in the press release that they will launch a new publishing label "Kadokawa Tsubasa Bunko" on March 3rd. The new label targets at children between 9 - 13 years old. They re-edit the existing light novels into children's literature. The major titles to be released are as follows:

The Melancholy of Haruhi Suzumiya
Slayers
Toki wo Kakeru Shoujo *the original novel was published in 1967.

The cover illustration of the new edition of "Toki wo Kakeru Shoujo" was drawn by Ito Noizi.
New cover of "Toki wo Kakeru Shoujo"

Voice actress Asano Masumi will make a debut as a novel writer from this label. The title of her first novel is "Hajimete no Magical Cookie".

Source: Press Release (PDF file)